Unable to Import, Save or Export in CorelDraw Graphics Suite 2018

I'm hoping someone can assist.

Two days ago I was no longer able to import / export / save or save as any files in CorelDraw. I can open previous work, but it won't allow me to save it.

I contacted support, which gave me a few things to do - none of which has solved the problem.

I am not in a financial position to upgrade the software - and I'm pretty bleak if that's the only option.

Has anyone else had these issues and have over come them?

Any help would be greatly appreciated!