When I open the Groove Agent plugin in Live it opens with a size that is smaller in height than the actual interface. This means some of the UI is not reachable.
I have now installed a trial version og Grove Agent (full version) and it opened with the correct window size. After this, for some reason, the SE version also opens correctly! 
On my second monitor it appears far too large.
EZdrummer3 with the same problem.
Closing and opening the pluginwindow moves it around somehow and you can resize it.