>Hi,
>
>If I didn't add any new classes or .PRG file but only made changes to the existing VCX or PRG file, can I copy the application .PJX/T file from the backup? That is, besides the list of the VCX classes and PRG files, does PJX/T have anything more that the backup may not have?

The .pjx is just a .dbf with a fancy extension. You can move the current one to a temp folder, restore and compare the number of records. If the current one has more at the bottom, just look at their name fields (optionally, open both new and old and set relation to recno() from new into old, then browse in parallel). If you remember you added any extra records manually to the project, add them again. If you don't remember, then they were added by the project manager automatically, and will be added so again.

The relationship on recno() will usually work, unless you did a „clean up project“ from the menu, which is actually packing it as a dbf.