Games installed on other partitions/external hardisks

That is strange... almost all of my games are installed on my external drive, and WeGame works with all of them (The ones that the client supports ofc)

I have my games saved in loads of different locations. World of warcraft is saved in my games (not program files) on the C drive. Guild wars is on the D drive as is all my stream stuff. I have no problems even with games on an external hard drive.
I would maybe recommend reinstalling the Wegame client. If that does not work then maybe ask the people who made it why it hates you >.<
(Just for comparison, My C drive is 144GB, D drive is 137GB, and my external hard drive is around 250GB which is only for back up really, I like my laptop :p)