Ever since I downloaded hitfilm, its been crashing whenever I try to use it, my pc is high performance so I'm not sure how to fix it.
AMD Ryzen 7 2700X Eight-Core Processor
Radeon RX Vega
Driver version: 31.0.12019.9007
First question - have you updated your drivers? One caveat on AMD gpu's is that there has been a bug present in the newer drivers. The best driver for now is the "Recommended" version (currently "Adrenalin 22.5.1 Recommended (WHQL)". So you might check on that.
Also please tell us which version of HF you are on. I assume HF Free? More details about when the software crashes would be helpful. Crashes on startup? Crashes when you add Media? Kind of hard to triage further without more information.