Close SRWare and delete the file, relaunch and it should be fixed.

^ I tried that several times and it worked as long as I didn't had extensions such as LastPass (among others) installed. Once I removed LastPass and the others which I don't remember (tried this a week ago, that's why), Incognito worked again. It must be a bug definitely. I won't be using this version without LastPass so I'll pass this one.