Cant open any Coreldraw file

So I have been using Coreldraw X8 successful for a long time. Never had any problems.

Today I cannot open any files. Whether I double click the file of whether I open i via the 'open files' dialogue, all coreldraw does is hang and freeze and I have to kill it. I can create a file Ok and I can then save it, but I cannot open it again.

I have tried the F8 reset option.

I have cleaned all temp files using ccleaner, manual deletion and windows cleaner.

I have uninstalled and reinstalled it - twice.

I have rebooted PC more times than I care to rememeber.

when it is hanging and I launch task manager, I see corel font manager active - using 7% CPU time, but draw itself is marked as unresponsive.

Not sure what else I can do - any suggestions?

Thanks!