So, I made the move finally. After a first unsuccessful import with a very messed up outcome to say the least, I managed to import my logbook from mccPilotLog to CrewLounge PILOTLOG. It also automatically downloaded the next planned flights for the rest of the month. I reckon it is somehow connected to the CONNECT roster app. I will have to become familiar with this feature since it wasn't available with my previous airline.
I paid with PayPal, so I'll be very critical after having spent around 100 euro for a software that I was the owner of already.