Exporting to Engine DJ & Rekordbox. Lexicon doesn't recognize changes

Hi,
I use Lexicon to sync to Engine DJ (on computer), Engine DJ (on device) and Rekordbox.
Whenever I use sync “Modified” to any of these and I want to sync to the next, Lexicon says that there are no changes. But actually there are changes for the next target. Also when I edit tags in Lexicon, it also says “No changes since last sync”. Or am I missing somehing here?

How do you mean “changes for the next target” ? What steps do you take between the modified syncs?

For example I import new tracks, sync them to Engine DJ and then want to sync to Rekordbox (no changes made since the last sync to Engine DJ but changes made since the last sync to Rekordbox) it says “No changes…” . Same when I sync to external drive and then to the Engine database on computer. I just change the “Sync to” dropdown.

Okay, it’s because you synced to Engine so there are no changes between the Engine and RB sync. The changes it tracks is shared between all DJ app syncs

OK, I tried it and on Windows the “Sync to Rekordbox” button is inactive, also when I change the “Target Drive” it stays inactive. However, on my Macbook it says “No changes since last sync” but the button is active and it starts syncing.
Thanks for your help.