Backing up and re-installing MPro

Since MPro has been unusable for a few months and webmail tends to be slow on NetSurf I thought I'd try to delete and re-install the only mail client available. Didn't want to lose all my mail though. Marked all, created and named folder, ticked "make personal" and archive. Did the same for sent mail. Where does MPro store these folders? Locate seemed to be unable to find it. 

Patric 
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Diese Nachricht wurde von meinem Android Mobiltelefon mit GMX Mail gesendet.