Corona asking me to activate every time i run max + mat editor constant crashes

[Jpjapers]

Installed corona on my home pc and every single time i run max it asks me to activate it again. Ive also been having alot of max crashes when doing things like resetting the mat editor, dragging materials from the material library into the mat editor, altering parameters in the mat editor. Not a 'not responding'. Its a full crash out and must have heppened 15 times in the last 24 hours. Also happens when stopping renders sometimes. its corona 1.7.2 and max 2017.

[sprayer]

Try to run 3ds max as administrator maybe your permission access is broken to some folders. the same for all what you are doing reinstalling etc

[Jpjapers]

After further digging i found loads of folders on my c drive that for some reason i didnt have access to. fresh reinstall of windows, fresh max and fresh corona and five hours later all seems to be working...

[maru]

Anyway, the solution was this: https://coronarenderer.freshdesk.com/support/solutions/articles/12000015667