if i were going to take over the maintaining of this plugin,which im not because im friendly with subix,and i dont have his permission,i would add about 6 lines of code to it to make the plugin redirect to the etc folder on your box,and read the private proxy from a file contained in that folder,before it read the original primewire.ag url
so each person would then have their own private proxy in their etc folder and no other could ever see or use it.
just a small tip if someone wants to fix this issue for everyone concerned.
Ian.