You cannot run AMPPS in any other folder than /Applications, I did try, and forum staff confirmed.
I did find another solution which actually works pretty well. inside AMPPS, it's the folder named 'www' where your site files and folders are stored. I simply moved that folder to another location and created a symbolic link to it where the original was.
For example, I placed the 'www' folder in my Documents folder, then in Terminal I cd to the AMPPS folder, then created a symbolic link by typing this:
Code
cd /Applications/AMPPS
ln -s /Users/MyUserName/Documents/www www
You can place the 'www' folder anywhere - my Documents folder made it easy enough to fix up permissions. In theory you could store it on a USB drive too, I guess.