RE: Macro
Hi Nadia,
Thank you for your post, and welcome to the forum.
In answer to your question; Before undertaking any editing on essential objects you should ensure you are working on a copy of the original, this way should unforeseen errors occur you will not have corrupted your database.
Sometimes it is better to re-record the Macro if it is a simple set of instructions/operations. However if this is not possible:
1. Go to File>New and open a new Worksheet. Then go to Window>Unhide to bring the personal macro workbook forward