Hi there, Happy New Year!!

I've installed 5.1.5 version on a MacBook Pro with Mac OSX Big Sur. Setup and first running went ok. But, when I try to load my first video to analysis, the app simply freezes without any option. I have uninstalled it and installed it back several times without any improvement. I've restated the system and modified the program available memory too, nothing happens. What can I do, please?