Which version are you using? I find Melodyne 4 window blank most often when creating a Reagion FX. The blobs are there but out of focus.
Once Melodyne opens in Multidock try going back to Track View and clicking on the clip or repositioning the Now Time Line. This will bring the blobs back into focus.
At worst you can drag the clip onto your desktop, edit it in Melodyne Standalone, then drag it back to the project.
To be sure... "Groove Agent resides at the 'outer limits' of the VST2 instrument specification." - SOS
Most .dll plugins will either be VST2, VST3, or DX which will be displayed in the flyout menus. You can change how they are displayed from the FX Rack or the Plugin Manager.
Yes. It's in the list of Drum Map Track Outputs... which is painfully slow to scroll thru. It's the 1st "P" listing in my list. Once you open the list you can hit the "P" key and jump right to it.
Either that or a different scenario is required no one has stumbled on yet.
OTOH the previous method may have never been intended by the bakers, so the 'loophole' was closed.
Unless Sonar changed this behavior you should simply be able to save the project with the Notes Browser open and it will remain open the next time you open the project. .... no Workspaces necessary.
This is because the current "Screenset" saves the current view arrangement when a project is saved. Once saved, it will remain even if you close the project unsaved.
The current screenset is always saved with the project even if you "think" you don't use them.