Scala Plugin Failed to Install New Version After The Plugin Upgrade Is Downloaded
Hi
I'm experiencing an issue where the Scala plugin fails to install successfully after the IDE has downloaded it. I observe that this issue only occurred with the most recent two or three IntelliJ versions.

I can see what the problem was because when my IntelliJ restarted, the previous IntelliJ's JVM still held onto the plugin. Therefore, the new IntelliJ instance cannot remove the old plugin and install the new one.
How I resolved this was to close my IntelliJ instead of restarting it. Then I terminate any remaining JVM instances in memory. I started a new IntelliJ instance. The Scala plugin was upgraded. This is annoying because I upgrade my Scala plugin frequently because I am using the EAP IntelliJ. How do I resolve this issue?
Thanks
My current IntelliJ version: -
IntelliJ IDEA 2025.2 EAP (Community Edition)
Build #IC-252.19874.12, built on June 3, 2025
Source revision: 1acbaa7dccd8d
Runtime version: 21.0.7+6-b1020.35 amd64 (JCEF 122.1.9)
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Toolkit: sun.awt.windows.WToolkit
Windows 11.0
Scala plugin:
=== scala settings for active project ===
compiler.highlighting.scala2.enabled=true
=== formatter settings for active project ===
formatter=scalafmt
GC: G1 Young Generation, G1 Concurrent GC, G1 Old Generation
Memory: 2048M
Cores: 20
Registry:
ide.balloon.shadow.size=0
debugger.new.tool.window.layout=true
ide.experimental.ui=true
scala.erase.compiler.process.jdk.once=false
jvm.dfa.analysis.ui.security.analysis.window.was.shown=true
llm.show.ai.promotion.window.on.start=false
Non-Bundled Plugins:
com.intellij.notebooks.core (252.19874.19)
com.intellij.properties (252.19874.19)
Batch Scripts Support (1.0.13)
org.toml.lang (252.19874.20)
intellij.jupyter (252.19874.19)
PerforceDirectPlugin (252.19874.19)
org.jetbrains.security.package-checker (252.19874.20)
Lombook Plugin (252.19874.12)
izhangzhihao.rainbow.brackets (2024.2.11-241)
org.intellij.scala (2025.2.439)
com.nasller.CodeGlancePro (1.9.8)
MavenRunHelper (4.30.0-IJ2022.2)
Kotlin: 252.19874.12-IJ
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