If you’ve already done the migration from your Fxpansion account to inMusic (which it sounds like you did), then most of your products will automatically transfer over with new serial #'s to inMusic, no prob. However, there were a few products that weren’t eligible for migration including, BFD1, BFD2, ECO and a few of the earlier expansions. You should be able to get replacement serials for that stuff. Read here:
Note that for BFD1 + 2, you will need to authorize the new serials for those, Eldorado and London Sessions and download the audio content for those. You won’t be able to use the existing installs you have of BFD1 + 2 because they are packaged differently. The inMusic LM and BFD3 will only recognize the Eldorado and London Sessions expansions. Same audio content.
Take note that your user/Documents location with presets, kits, maps and grooves, etc., is now BFD Drums and not Fxpansion. You can have the new BFD3 migrate (at any time) your old user files, or just manually move/copy them to the BFD Drums location.
There’s some good and bad with the move to inMusic, but if you can get BFD running, the experience will be similar for the most part.