It keeps crashing and won’t open. I already activated it, and I’ve been messing with it for ages.

This??

yes,I have installed it repeatedly and cleaned up the computer junk, but it still crashes when I open the software, and my computer has also restarted

The linked thread tells you how to work around this until Steinberg fix it.

Thank you, I reinstalled the computer system, the username cannot have Chinese characters, it’s solved, but now I have another bug. VST2 crashes when opened. Do I need the Pro version to use VST2?