Moving files is not recommended. Which ones did you move?
Depending on what has happened, reinstalling TR5 could be problematic so I hesitate to advise.
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The best thing to do is
contact Supports, via here. There is a link at the top of the Search FAQs page to the Technical Support form, for some one to one investigation and help. Please provide details of what has happened.
Response time is usually within 2 working days (US (East Coast) Business hours, generally), but in the current circumstances please allow some more time.
And, to help others who run into a similar problem, please let us know what you did to resolve the problem. Please do not quote directly any correspondence from Support, as that may apply only to your particular circumstances and may lead others down the wrong track.