If I have advice to communicate with the Beta 15 (it's a beta 1 => OK):
-make the maximum backup (including HDD OS)
- Export all your projects in .DRP
Uninstall All that is BlackMAgic
Delete All that is BlackMagic (directory)
(windows) Find a utility such as Ccleaner or JV16 PowerTools or use Revo uninstall PRO or (?) and clean all traces (like a clean install (Registry and Directory)) + reboot
Install Blackmagic_Desktop_Video_10.9.12 + reboot
Install Davinci Resolve v15B001 + disk database + postgresql (use for audio library)
and re-import your database and / or your .DPR one by one into the original container
Origin Disk => Disk
GOLD
Origin Disk => PostGreSql (if you know what you are doing)
I just did some tests between Edit => Fusion. Fusion => COLOR and Color => Fusion and no crash. + Title + Alpha on Tab Edit ...(2 hours)
it remains a beta. No plugin but wait ... (Hope)
Pst: no return of v15 to v14 => update of the database. Warning...
Or restore HDD OS