I am going to adopt the same principle I use when creating applications and that is to save versions of a form not just edit the original. That way I can always go back.
One method I use is to create a folder say C:\a and then with each version add a folder ie C:\a\a so each verion is identified. In code I can make a change note but with forms I have decided to place a readme.txt to note the modification made.
Sounds overdone but it has saved me on quite a few occasions
There are other ways of version saving but it is advisable to do it
Terry I believe in belts and braces
The Guy from OZ