Editing Guitar Tabs changed in version 4.5.1

I am a guitarist and I use Musescore to translate traditional melody lines in standard score into tabulatur.
Since there are up to 5 possibilities to play a given note/pitch on a guitar, it is a typical task, to switch between these different possibilities to make melody lines easier to play.
In the previous version of MuseScore it was easy to change the string of a note in TAB by simply dragging the fret-number from one string to another string (e.g. note: c -> b string, fret 1 would become e-string fret 6).
In the actual version 4.5.1 moving the note in TAB between strings seems to be not longer possible. drag'n'drop of the fret number does not work anymore.
Is there a way to change the string for a given note?