https://bugs.winehq.org/show_bug.cgi?id=53075
--- Comment #2 from sam nonamedboy@outlook.com --- UPDATE: bug is present using wine-7.11 and wine-7.12
It appears that if you try to run the application often enough there will be a small chance of it eventually starting up and running normally. You are then able to install any library from within the application. The installed VST should work without major problems afterwards. If you want to uninstall, reinstall, update or remove an existing library or install a new library at a later point (i.e. after the application has been closed or the system has been rebooted) you need to get lucky again.