Company File Check & Repair - Password?

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I have an error message re. "Unhandled exception has occurred in a component in your application.......etc"

After checking through this forum, I believe I can at least attempt to fix this by running the Company File Check & Repair option. However, when I try to run this it requests a password. I do not have a password set up for my Simply Accounting files. I tried setting up same, which worked fine for accessing my data, but would not permit me to access the Company File Check & Repair program. If anyone has any ideas, I'd be happy to try them! Many thanks.