First, forget about the .properties file. Undo any changes you may have made to it.
Secondly, you need to tick the checkbox at 11a and make a choice at 11b.
http://www.sb-innovation.de/attachme...chmentid=18710
If the client and/or version you want isn't available, look for a client file at BiglyBT/Vuze Extreme Mod Client Files. If it's not there, ask for it in this thread. Builds 25130 and 25302 of uTorrent 2.2.1 are bundled with the mod, though, so there should be no problems here.
Save settings and restart. The mod will now be spoofing the client you chose to both trackers and peers. You can confirm that it's active by checking the status bar in the bottom left corner of the client's window; it will say something like "!uTorrent 2.2.1.25302!" instead of "BiglyBT Extreme Mod".
After doing all this, you may find that certain settings, including 7a and 7b, scrape support and the maximum number of connections per torrent, become unavailable. That's because altering them would compromise the security of the spoof you've picked. Nothing to worry about.