Have you tried closing the other instance of MX studio?
Check if you are able to login on the Mendix website. Then try removing/uninstalling the Studio Pro and restart PC. Then download your desired version from the Marketplace and install it again.
If it does not work, then contact Mendix Support and submit a request
This is a known bug with some graphics cards. What worked for me:
Took a few tries to work for me, but I finally got it to work.
Reference this forum post for more info: https://forum.mendix.com/link/questions/107378
Hope that helps.