IntelliJ immediately crashes after loading the project [I also opened it in BlueJ, that started the troubles]

I upgraded to 2017.3 today , so far no problem.

Then I also opened the Project folder in BlueJ (I know, kindergarten-IDE, but I need to test single Methods without any extra code, and BlueJ came to mind,

[if there is a Plugin for that, I d take that any time]

The problem however is that once I open it as "external Project" in BlueJ I cant load it in IntelliJ anymore.

Well, it does load, prepare the workspace, and after its done, IntelliJ just closes...

[Also: is there a script to add linebreaks to the logfile automatically? otherwise its pretty much unreadable]

Here's the log:

2017-12-03 23:34:02,439 [ 0] INFO - #com.intellij.idea.Main - ------------------------------------------------------ IDE STARTED ------------------------------------------------------
2017-12-03 23:34:02,449 [ 10] INFO - #com.intellij.util.ui.JBUI - User scale factor: 1.0
2017-12-03 23:34:02,449 [ 10] INFO - #com.intellij.util.ui.JBUI - System scale factor: 1.0 (IDE-managed HiDPI)
2017-12-03 23:34:02,457 [ 18] INFO - #com.intellij.idea.Main - IDE: IntelliJ IDEA (build #IC-173.3727.127, 27 Nov 2017 15:02)
2017-12-03 23:34:02,457 [ 18] INFO - #com.intellij.idea.Main - OS: Windows 10 (10.0, amd64)
2017-12-03 23:34:02,457 [ 18] INFO - #com.intellij.idea.Main - JRE: 1.8.0_152-release-1024-b6 (JetBrains s.r.o)
2017-12-03 23:34:02,459 [ 20] INFO - #com.intellij.idea.Main - JVM: 25.152-b6 (OpenJDK 64-Bit Server VM)
2017-12-03 23:34:02,460 [ 21] INFO - #com.intellij.idea.Main - JVM Args: -Xms128m -Xmx750m -XX:ReservedCodeCacheSize=240m -XX:+UseConcMarkSweepGC -XX:SoftRefLRUPolicyMSPerMB=50 -ea -Dsun.io.useCanonCaches=false -Djava.net.preferIPv4Stack=true -XX:+HeapDumpOnOutOfMemoryError -XX:-OmitStackTraceInFastThrow -Djb.vmOptionsFile=D:\Programme\IntelliJ\IntelliJ IDEA Community Edition 2017.3\bin\idea64.exe.vmoptions -Xbootclasspath/a:D:\Programme\IntelliJ\IntelliJ IDEA Community Edition 2017.3\lib\boot.jar -Didea.platform.prefix=Idea -Didea.jre.check=true -Didea.paths.selector=IdeaIC2017.3 -XX:ErrorFile=C:\Users\Kili\java_error_in_idea_%p.log -XX:HeapDumpPath=C:\Users\Kili\java_error_in_idea.hprof
2017-12-03 23:34:02,462 [ 23] INFO - #com.intellij.idea.Main - ForkJoinPool.commonPool: java.util.concurrent.ForkJoinPool@3fb2bd6e[Running, parallelism = 7, size = 0, active = 0, running = 0, steals = 0, tasks = 0, submissions = 0]
2017-12-03 23:34:02,462 [ 23] INFO - #com.intellij.idea.Main - ext: D:\Programme\IntelliJ\IntelliJ IDEA Community Edition 2017.3\jre64\lib\ext: [access-bridge-64.jar, cldrdata.jar, dnsns.jar, jaccess.jar, jfxrt.jar, localedata.jar, meta-index, nashorn.jar, sunec.jar, sunjce_provider.jar, sunmscapi.jar, sunpkcs11.jar, zipfs.jar]
2017-12-03 23:34:02,462 [ 23] INFO - #com.intellij.idea.Main - JNU charset: Cp1252
2017-12-03 23:34:02,503 [ 64] INFO - #com.intellij.idea.Main - JNA library (64-bit) loaded in 41 ms
2017-12-03 23:34:02,505 [ 66] INFO - penapi.util.io.win32.IdeaWin32 - Native filesystem for Windows is operational
2017-12-03 23:34:03,064 [ 625] INFO - plication.impl.ApplicationImpl - Received external Windows command line: current directory C:\Users\Kili\Desktop, command line "D:\Programme\IntelliJ\IntelliJ IDEA Community Edition 2017.3\bin\idea64.exe"
2017-12-03 23:34:03,111 [ 672] INFO - llij.ide.plugins.PluginManager - Cannot find optional descriptor duplicates-groovy.xml
2017-12-03 23:34:03,508 [ 1069] INFO - llij.ide.plugins.PluginManager - 35 plugins initialized in 589 ms
2017-12-03 23:34:03,513 [ 1074] INFO - llij.ide.plugins.PluginManager - Loaded bundled plugins: Android Support (10.2.3), Ant Support (1.0), Bytecode Viewer (0.1), CVS Integration (11), Copyright (8.1), Coverage (173.3727.127), Eclipse Integration (3.0), EditorConfig (173.3727.127), Git Integration (8.1), GitHub (173.3727.127), Gradle (173.3727.127), Groovy (9.0), I18n for Java (173.3727.127), IDEA CORE (173.3727.127), IntelliLang (8.0), JUnit (1.0), Java Bytecode Decompiler (173.3727.127), Java Stream Debugger (173.3727.127), JavaFX (1.0), Kotlin (1.2.0-release-IJ2017.3-1), Maven Integration (173.3727.127), Mercurial Integration (10.0), Plugin DevKit (1.0), Properties Support (173.3727.127), Settings Repository (173.3727.127), Subversion Integration (1.1), Task Management (1.0), Terminal (0.1), TestNG-J (8.0), UI Designer (173.3727.127), XPathView + XSLT Support (4), XSLT-Debugger (1.4), YAML (173.3727.127)
2017-12-03 23:34:03,513 [ 1074] INFO - llij.ide.plugins.PluginManager - Loaded custom plugins: Java Decompiler IntelliJ Plugin (0.6), PlantUML integration (2.9.0)
2017-12-03 23:34:04,532 [ 2093] INFO - ellij.util.io.PagedFileStorage - lower=100; upper=500; buffer=10; max=705
2017-12-03 23:34:04,570 [ 2131] INFO - pl.local.NativeFileWatcherImpl - Starting file watcher: D:\Programme\IntelliJ\IntelliJ IDEA Community Edition 2017.3\bin\fsnotifier64.exe
2017-12-03 23:34:04,580 [ 2141] INFO - pl.local.NativeFileWatcherImpl - Native file watcher is operational.
2017-12-03 23:34:05,142 [ 2703] INFO - .openapi.application.Preloader - Finished preloading com.intellij.ide.ui.OptionsTopHitProvider$Activity@21cf6291
2017-12-03 23:34:05,238 [ 2799] INFO - til.net.ssl.CertificateManager - Default SSL context initialized
2017-12-03 23:34:05,358 [ 2919] INFO - rains.ide.BuiltInServerManager - built-in server started, port 63342
2017-12-03 23:34:05,394 [ 2955] INFO - gs.impl.UpdateCheckerComponent - channel: release
2017-12-03 23:34:05,608 [ 3169] INFO - il.indexing.FileBasedIndexImpl - Index exts enumerated:171
2017-12-03 23:34:05,613 [ 3174] INFO - il.indexing.FileBasedIndexImpl - Index scheduled:4
2017-12-03 23:34:05,630 [ 3191] INFO - tellij.psi.stubs.StubIndexImpl - All stub exts enumerated:13
2017-12-03 23:34:05,631 [ 3192] INFO - tellij.psi.stubs.StubIndexImpl - stub exts update scheduled:0
2017-12-03 23:34:05,807 [ 3368] INFO - plication.impl.ApplicationImpl - 88 application components initialized in 2891ms
2017-12-03 23:34:05,820 [ 3381] INFO - .intellij.idea.IdeaApplication - App initialization took 5078 ms
2017-12-03 23:34:06,256 [ 3817] INFO - pl$FileIndexDataInitialization - Initialization done:642
2017-12-03 23:34:06,395 [ 3956] INFO - exImpl$StubIndexInitialization - Initialization done:139
2017-12-03 23:34:06,741 [ 4302] INFO - .openapi.application.Preloader - Finished preloading com.intellij.openapi.actionSystem.impl.ActionPreloader@8228067
2017-12-03 23:34:06,750 [ 4311] INFO - com.intellij.ide.ui.UISettings - Loaded: fontSize=12, fontScale=1.0; restored: fontSize=12, fontScale=1.0
2017-12-03 23:34:06,753 [ 4314] INFO - com.intellij.ide.ui.UISettings - Loaded: fontSize=15, fontScale=1.0; restored: fontSize=15, fontScale=1.0
2017-12-03 23:34:07,129 [ 4690] INFO - pl.projectlevelman.NewMappings - VCS Root: [] - [<Project>]
2017-12-03 23:34:07,130 [ 4691] INFO - pl.projectlevelman.NewMappings - VCS Root: [svn] - [<Project>]
2017-12-03 23:34:08,202 [ 5763] INFO - ellij.project.impl.ProjectImpl - 148 project components initialized in 2025 ms
2017-12-03 23:34:08,351 [ 5912] INFO - .openapi.application.Preloader - Finished preloading com.intellij.ide.ui.search.SearchableOptionPreloader@6904146c
2017-12-03 23:34:08,454 [ 6015] INFO - le.impl.ModuleManagerComponent - 1 module(s) loaded in 251 ms
2017-12-03 23:34:08,556 [ 6117] INFO - .openapi.application.Preloader - Finished preloading com.intellij.codeInsight.completion.CompletionPreloader@75c3908a
2017-12-03 23:34:08,621 [ 6182] INFO - j.ide.script.IdeStartupScripts - 0 startup script(s) found
2017-12-03 23:34:09,066 [ 6627] INFO - CompilerBackwardReferenceIndex - backward reference index version differ due to: class java.io.FileNotFoundException
2017-12-03 23:34:09,342 [ 6903] INFO - .diagnostic.PerformanceWatcher - Pushing properties took 36ms; general responsiveness: ok; EDT responsiveness: ok
2017-12-03 23:34:09,453 [ 7014] INFO - ScriptTemplatesProviders - [kts] loading script definitions [] using cp:
2017-12-03 23:34:09,457 [ 7018] INFO - ScriptTemplatesProviders - Templates provider KotlinCompilerScriptTemplatesSettings is invalid:
2017-12-03 23:34:09,482 [ 7043] INFO - ScriptTemplatesProviders - Templates provider Gradle Kotlin DSL is invalid: Unable to get Gradle home directory
2017-12-03 23:34:09,483 [ 7044] INFO - ScriptTemplatesProviders - Templates provider Gradle Kotlin DSL is invalid: Unable to get Gradle home directory
2017-12-03 23:34:09,483 [ 7044] INFO - ScriptTemplatesProviders - Templates provider Gradle Script Kotlin is invalid: Unable to get Gradle home directory
2017-12-03 23:34:09,483 [ 7044] INFO - ScriptTemplatesProviders - [kts] loading script definitions [kotlin.script.templates.standard.ScriptTemplateWithArgs] using cp:
2017-12-03 23:34:09,572 [ 7133] INFO - rojectCodeStyleSettingsManager - Initialized from default code style settings.
2017-12-03 23:34:10,591 [ 8152] INFO - tartup.impl.StartupManagerImpl - OpenFilesActivity run in 1436ms under project opening modal progress
2017-12-03 23:34:10,651 [ 8212] INFO - .diagnostic.PerformanceWatcher - Post-startup activities under progress took 1524ms; general responsiveness: ok; EDT responsiveness: ok
2017-12-03 23:34:10,951 [ 8512] INFO - ellij.ide.CommandLineProcessor - -----
2017-12-03 23:34:11,337 [ 8898] INFO - j.ide.ui.OptionsTopHitProvider - 268 ms spent to cache options in application
2017-12-03 23:34:11,343 [ 8904] INFO - tartup.impl.StartupManagerImpl - D:/Creative/Programming/Code/Hauptprojekt/.idea case-sensitivity: expected=false actual=false
2017-12-03 23:34:11,721 [ 9282] INFO - pl.projectlevelman.NewMappings - VCS Root: [svn] - [<Project>]
2017-12-03 23:34:11,870 [ 9431] INFO - tor.impl.FileEditorManagerImpl - Project opening took 5761 ms
2017-12-03 23:34:13,885 [ 11446] INFO - .diagnostic.PerformanceWatcher - Indexable file iteration took 4541ms; general responsiveness: ok; EDT responsiveness: ok
2017-12-03 23:34:13,896 [ 11457] INFO - g.FileBasedIndexProjectHandler - Reindexing refreshed files: 27 to update, calculated in 5ms
2017-12-03 23:34:14,139 [ 11700] INFO - .diagnostic.PerformanceWatcher - Reindexing refreshed files took 243ms; general responsiveness: ok; EDT responsiveness: ok
2017-12-03 23:34:14,140 [ 11701] INFO - g.FileBasedIndexProjectHandler - Reindexing refreshed files: 31 to update, calculated in 0ms
2017-12-03 23:34:14,197 [ 11758] INFO - .diagnostic.PerformanceWatcher - Reindexing refreshed files took 57ms; general responsiveness: ok; EDT responsiveness: ok