IntelliJ IDEA Ultimate has stopped opening for me ...

# intellij

[v79]

IntelliJ IDEA Ultimate has stopped opening for me - not sure what I did. It just stalls at the splash screen. Anything I can do before I try a reinstall? There are errors when I launch it from the Windows command line:

2023-08-25 15:09:22,296 [   1020] SEVERE - #c.i.o.a.i.ActionManagerImpl - com.intellij.ml.llm.vcs.LLMRewordCommitAction (Vcs.LLMRewordCommitAction): group with id "Git.Reword.ToolbarActions" isn't registered; action will be added to the "Other" group (module=PluginDescriptor(name=AI Assistant, id=com.intellij.ml.llm, descriptorPath=plugin.xml, path=~\AppData\Roaming\JetBrains\IntelliJIdea2023.2\plugins\ml-llm, version=232.9613, package=com.intellij.ml.llm, isBundled=false))
com.intellij.diagnostic.PluginException: com.intellij.ml.llm.vcs.LLMRewordCommitAction (Vcs.LLMRewordCommitAction): group with id "Git.Reword.ToolbarActions" isn't registered; action will be added to the "Other" group (module=PluginDescriptor(name=AI Assistant, id=com.intellij.ml.llm, descriptorPath=plugin.xml, path=~\AppData\Roaming\JetBrains\IntelliJIdea2023.2\plugins\ml-llm, version=232.9613, package=com.intellij.ml.llm, isBundled=false))

Followed by stacktrace. And also:

2023-08-25 15:09:22,304 [   1028] SEVERE - #c.i.o.a.i.ActionManagerImpl - IntelliJ IDEA 2023.2  Build #IU-232.8660.185
2023-08-25 15:09:22,304 [   1028] SEVERE - #c.i.o.a.i.ActionManagerImpl - JDK: 17.0.7; VM: OpenJDK 64-Bit Server VM; Vendor: JetBrains s.r.o.
2023-08-25 15:09:22,304 [   1028] SEVERE - #c.i.o.a.i.ActionManagerImpl - OS: Windows 11
2023-08-25 15:09:22,305 [   1029] SEVERE - #c.i.o.a.i.ActionManagerImpl - Plugin to blame: AI Assistant version: 232.9613

[v79]

I found the disableNonBundledPlugins command line option, which has allowed me to recover IDEA.