I have several folders with seperate cgminer versions. I have not tried to btc with the cgminer I use for ltc.
I keep them seperate.
This is what I'm using to start the program.
./cgminer -o pool.maxbtc.com:8332 -u xxxx -p xxxx -I 5 --auto-gpu --auto-fan --gpu-threads 1 --gpu-engine 800-950 --gpu-memclock 795 --temp-target 70 --temp-overheat 80
With my username and password, in place of the xxxx.
I can't really re-install as cgminer isn't installed. It's just downloaded and unziped and ran.
I'm running linux not windows.
Thanks
Ron