Cannot run 'Make solution'

EDIT:
Fixed it with restarting my PC and mbeddr!

When I try to click "Make Solution" (with included mbeddr Plugin), I get the following error message:
Cannot run program "make" (in directory "..source_gen\NewSolution\main"): CreateProcess error=2, the system couldn't...

I tried to add the binaries to the Windows system path variable (mentioned in the link above), but it was only working in the cmd, not with MPS.
http://mbeddr.com/download.html#ChangingPath

Can someone help me?

Best regards
msch95