Hello Daniel,

What steps did you take to install the 2.0.3 patch? Did you just run the patch and nothing else? Did you move the Composer program from one directory to another?

Please try this: In the \Program Files\Notation\Composer directory,
rename MidiDev.cfg to MidiDev.bak, and then run Composer again. Does that fix the problem?

If so, please send me the renamed MidiDev.bak file.

Cheers
-- Mark