Well... i had this problem since the first V7...
when i link faders (physical) to showxpress (master fades) and then i do a little test... THE PROGRAM FREEZES... i tested using a nanokontrol, AKAI, also VIRTUAL MIDI CONTROLLERS (with Ableton and FL Studio) and the same thing... when i do some FAST movements the program freezes... its this normal?
Now, a solution that worked for me: RUN Showxpress As Administrator...