Updating old save files with new versions

My customer requested an update on a Budgeting tool I wrote using XLS Padlock and VBA.

He deleted the old version and downloaded the new version (With updated VBA Code), and it works perfectly when he uses the original file.

But when he tries to open his saved file (This has a LOT of data and it will take too much time to try and duplicate it), the old VBA code is still at work, instead of the new code.

Please can you tell me what I can do to fix this?

Check this section in our user guide: