@Rob-Dowd

Hi and welcome to the forum.

Not a lot of information to go on here - we need more:

1. program full name and version number as found uner Help, About
    
2. computer specification - see this topic for details of what is required - please be prciese when quoting processor graphics card make & model
    
3. what change going from working to not working?

Please note that we cannot see your computer screen, so other relevant information may help.

John EB
Forum Moderator