@tm8544 said: There is a regression in Notepad++ 8.9.9. I saw it already in 8.9.8.1, but I could not pinpoint it at that time. “Regression” means a bug introduced in this version that wasn’t present in the previous version. So if you saw it in the previous version, then it’s not a regression, just a bug. Use Compare plugin, diff since last save (Ctrl+Alt+D) This sounds a lot like this report, which the plugin author is now looking into and tracking in that plugin’s issue tracker. Plugin authors are responsible for investigating bugs/crashes that are caused when using features of their plugins, as they are the only ones who can determine whether the problem is on their end or on Notepad++'s end; bugs/crashes in a plugin should be reported directly to the plugin author.

@Sevens99 I guess that it depends on a specific SW (Windows edition, build, libraries, other installed shell context menu handlers) rather than on a different HW. But who knows. It’s a race condition bug, so everything is possible.