I would suggest to go back to basics. Start as clean as can be achieved.
Delete all installations.
Manual remove the mixvibes.settings file
Disconnect any device.
Install 3.3.5
Create a new collection. Add some tracks.
Play around...
Add devices (and restart Cross).
Play around...
Change to a copy of your collection
Play around...
Hope this sheds a light as to the where it might go wrong (and basically excluding options).
in Windows the 32/64 bit links are like this
32and64bit.png
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