My tracks from the GNX3 are REALLY quiet on the computer. What do I do?
Your sound recording software probably has a "Normalize" function. Try that out. Dr. Eaglion says (in reference to SoundForge's normalize vs Cakewalk's) "Cakewalk's normalize is good for balanced dynamics. When you have an unbalance dynamics you better use soundforge."
I Did a factory reset, now many presets make no sound.
You have to complete the expression pedal recalibration as part of the factory reset. This is detailed on Page 67 of the GNX3 manual. You should probably recalibrate the V-Switch threshold as well (also p 67 of the GNX3 manual).
How to I get WAV files into Cakewalk?
Pull down "Insert", select "Wav File" and follow the dialog instructions.