I work as a freelance estimator, and either use my own spread sheets or create new ones, that I own on other peoples computers.
Is it possible to protect these sheets somehow, So I and anyone else can use them whilst I am working there, but once i have left they can no longer use them.
So perhaps have a one month limit on the use of a spread sheet that I can re new as and when required?
Also it would have to be capable of stopping someone just copying the spread sheet and saving it and using it under a different name.
Could it be something that i could add to my spread sheets?
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