Toolbox not opening correctly, accounts.json missing

For a while now my Toolbox app is not opening correctly. It starts, but only shows a transparent outline of the Toolbox window. The logs say that accounts.json is missing (I presume this causes the problem):

```

1.22.10685 3672 2021-11-14 19:51:32.126 WARN main AccountManagerImpl Failed to load user accounts: C:\Users\R\AppData\Local\JetBrains\Toolbox\accounts.json (The system cannot find the file specified)
1.22.10685 3672 2021-11-14 19:51:32.141 WARN DefaultDispatcher-worker-1 AccountManagerImpl Failed to load user accounts: C:\Users\R\AppData\Local\JetBrains\Toolbox\accounts.json (The system cannot find the file specified)
1.22.10685 3672 2021-11-14 19:51:32.148 INFO main AccountManagerImpl Provider registered: com.jetbrains.toolbox.accounts.oauth.jba.JetBrainsAccountProviderImpl@2034ec03
1.22.10685 3672 2021-11-14 19:51:32.150 WARN DefaultDispatcher-worker-3 AccountManagerImpl Failed to load user accounts: C:\Users\R\AppData\Local\JetBrains\Toolbox\accounts.json (The system cannot find the file specified)
1.22.10685 3672 2021-11-14 19:51:32.166 INFO main Capabilities toolbox_version = 1.22.10685
1.22.10685 3672 2021-11-14 19:51:32.167 INFO main Capabilities os = windows
1.22.10685 3672 2021-11-14 19:51:32.167 INFO main Capabilities os_kernel = Windows
1.22.10685 3672 2021-11-14 19:51:32.182 INFO main Capabilities os_version_major = 10
1.22.10685 3672 2021-11-14 19:51:32.182 INFO main Capabilities os_version_minor = 0
1.22.10685 3672 2021-11-14 19:51:32.182 INFO main Capabilities os_version_micro =
1.22.10685 3672 2021-11-14 19:51:32.183 INFO main Capabilities os_version = 10.0
1.22.10685 3672 2021-11-14 19:51:32.183 INFO main Capabilities cpu_arch = x64
1.22.10685 3672 2021-11-14 19:51:32.183 INFO main Capabilities glibc = 0
1.22.10685 3672 2021-11-14 19:51:32.200 INFO DefaultDispatcher-worker-5 AccountManagerImpl No accounts exists and accounts file is empty
1.22.10685 3672 2021-11-14 19:51:32.320 INFO DefaultDispatcher-worker-5 UpdateManagerLocalApplicationsFilter Selected Toolbox update: <NONE>
1.22.10685 3672 2021-11-14 19:51:32.324 ERROR DefaultDispatcher-worker-5 ApplicationManagerKt Unhandled exception in coroutine: java.lang.NullPointerException
at com.jetbrains.toolbox.UpdateManagerImpl.checkUpdateStatus(UpdateManager.kt:205)
at com.jetbrains.toolbox.UpdateManagerImpl.access$checkUpdateStatus(UpdateManager.kt:15)
at com.jetbrains.toolbox.UpdateManagerImpl$2$invokeSuspend$$inlined$collect$1.emit(Collect.kt:135)
at kotlinx.coroutines.flow.StateFlowImpl.collect(StateFlow.kt:398)
at com.jetbrains.toolbox.UpdateManagerImpl$2.invokeSuspend(UpdateManager.kt:227)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:571)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:750)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:678)
at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:665)

```

And there is an additional error after the one above (although I think this one is unrelated):

```

1.22.10685 3672 2021-11-14 19:51:43.019 INFO Feed Update 0 DownloadSessionImpl Error requesting https://toolbox-internal-feed.labs.intellij.net/feeds/v1/internal-feed.feed.xz.signed. No such host is known (toolbox-internal-feed.labs.intellij.net): java.net.UnknownHostException: No such host is known (toolbox-internal-feed.labs.intellij.net)
at java.base/java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.base/java.net.InetAddress$PlatformNameService.lookupAllHostAddr(Unknown Source)
at java.base/java.net.InetAddress.getAddressesFromNameService(Unknown Source)
at java.base/java.net.InetAddress$NameServiceAddresses.get(Unknown Source)
at java.base/java.net.InetAddress.getAllByName0(Unknown Source)
at java.base/java.net.InetAddress.getAllByName(Unknown Source)
at java.base/java.net.InetAddress.getAllByName(Unknown Source)
at okhttp3.Dns$Companion$DnsSystem.lookup(Dns.kt:49)
at okhttp3.internal.connection.RouteSelector.resetNextInetSocketAddress(RouteSelector.kt:164)
at okhttp3.internal.connection.RouteSelector.nextProxy(RouteSelector.kt:129)
at okhttp3.internal.connection.RouteSelector.next(RouteSelector.kt:71)
at okhttp3.internal.connection.ExchangeFinder.findConnection(ExchangeFinder.kt:205)
at okhttp3.internal.connection.ExchangeFinder.findHealthyConnection(ExchangeFinder.kt:106)
at okhttp3.internal.connection.ExchangeFinder.find(ExchangeFinder.kt:74)
at okhttp3.internal.connection.RealCall.initExchange$okhttp(RealCall.kt:255)
at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.kt:32)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.kt:95)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.kt:83)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.kt:76)
at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109)
at okhttp3.internal.connection.RealCall.getResponseWithInterceptorChain$okhttp(RealCall.kt:201)
at okhttp3.internal.connection.RealCall$AsyncCall.run(RealCall.kt:517)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.base/java.lang.Thread.run(Unknown Source)
1.22.10685 3672 2021-11-14 19:51:43.033 WARN Feed Update 0 ApplicationFeedDownloader Unable to download feed from https://toolbox-internal-feed.labs.intellij.net/feeds/v1/internal-feed.feed.xz.signed: No such host is known (toolbox-internal-feed.labs.intellij.net)
1.22.10685 3672 2021-11-14 19:51:43.039 WARN DefaultDispatcher-worker-9 RemoteApplications Feed update finished, found: 127 items, 704 patches

```

How can I fix this? I'd rather not reinstall Toolbox, because it looks like that would also uninstall the IDEs?

P.S.: add a 'Toolbox' option to the Topic dropdown. I am required to pick something, but Toolbox is not in the list.