Hi Coz
I had exactly the same issue, Alt-V worked for a long time and then suddenly stopped to work. As I am used to this short-cut I now use a macro that works with a named clipboard, in my case named «Clipboard We unformatiert», you have to create your own named clipboard and put that name into the macro enclosed.
Here is the macro (I do not remember whom it came from):
Unformatiert einfügen.kmmacros (3.0 KB)
Hope that works for you!
Walter