No, It wasnt the purchase dates that were causing your problem in the first place in the 2.5 XML. There also more new features in 2.5 that will not work correctly with the 2.4 release. Nothing major, and all new features have been addressed in DMX-3000, so the software will be ready when 2.5 is current.

The purchase date issue was just an odd side effect from taking a 2.5 collection back to 2.4

-3B