4.6.3
It's still crashing immediately upon opening in 4.6.3. 4.6.1 did not have this problem, but other than that, I really have no clue. Great product when it works though!
Partner Response: We saw several reports of crashes in MuseScore 4.6 that were caused by older versions of MuseScore 4 being present on the same Windows machine. This might affect you if you used earlier versions of MuseHub, which used to install MuseScore to a different location. If so, please make sure the old versions are fully removed before you upgrade to the new version. If you do want to use multiple versions of MuseScore 4 on Windows, consider using the portable EXE for past versions, and use MuseHub or the standard MSI installer for the current stable release.
Please note, using multiple MuseScore 4 versions is not a supported configuration on any operating system. In particular, when you switch to an older MuseScore 4 version, you may experience strange UI bugs until you use Help > Reset to factory settings. This does not apply to running MuseScore 3 and MuseScore 4 on the same machine, which is supported via the standard installers.