Illustrator CC4 keeps crashing - windows 10
Illustrator CC4 keeps crashing , it may have to do with something in specific files , but copying to new files and saving again doesn't help.
The program keeps closing down over the smallest thing I do , whether it is Select All , trying to change font , or dragging items within the sketch.
I am desperate as I need to finish a lot of setches and for the last hour I have seen Illsutrator close itself about 30 times. I have no idea how to fix this , and am a layman when it comes to Safe mode start ( which I tried but then I couldn't open Illsutrator as it says the licence isn't valid , which is nonsense as I bought it ) or other specific procedures.
What to do ???