Attention!! Bug in TOMTOM Home app (Macintosh version)
I have found a work-around for this problem, but if this problem is not escalated tot the right persons, the bug in de TOMTOM Home app will not be solved. So I hope this post will do that. (the problem is of course not the loopdir directory, but the file in that directory: loopback.ex3)
In the meantime I have a work-around that solved my problem and I hope this can also help others. For this work-around you must already have a backup of your memory card on your Mac!
The workaround is: Replace manually de loopdir directory from the USB memory card with the loopdir directory from the BACKUP on your Macintosh (probably in de 'tomtom' directory in 'documents')
You must do that every time the memory card has been in the Carminat console in your car (I suppose the Carminat console replaces the file loopback.ex3 with a version the Mac TOMTOM Home app cannot read).