Hi Iris,
The silly thing was that I could upgrade from within my subscription to several other plans, but not to ProPlus: I was not offered. I need MS Access, so I had no choice. Maybe it is a bug, but for me it was very unpractical.
I am a bit stuck now :-( because my mail still arrivés at my old account and - as I pay double so far - I need to cancel this plan.
Any tips? Thanks in advance!
Marius