Diatonic accordion

Hi,

I'm totally new to Musescore and haven't a clue about plugins.
I've entered two scores now and added the tablature as just plain lyrics text.
Rather tedious and time-consuming.
So, I'm looking for a way to translate notes automatically to fingering (and or vice versa)
It seems to me that there was a plugin for an earlier version of musescore but I dont know how to get this working (or if it works at all...)
Who could send me in the right direction??

Many thanks.
Sietze

PS I play the diatonic accordion two-row, in CF, AD and GC
(plus a 30 button clover concertina)