I am on an iMac Pro with a Xeon 8-core processor and Radeon Pro Vega 56. Ever since 15.0, PP crashes every time I open a project created in a previous version.I crash EVERY time I OPEN a project that was started in a previous version. The only way I can proceed is to create a NEW project in 15.1, the IMPORT the sequence from the old project. Then I can work on it, but if I save it and close it and quit PP, it WILL CRASHH AGAIN IF I OPEN THAT SAME PROJECT, so I have to do it again. I have to make a NEW PROJECT EVERY TIME, and import the old one. SHEESH! This is terrible.