You may wanna reinstall Plus! If that doesn't work all i can say is: it's a beta, wich means things may or may not work. If it doesn't work after a reinstall please state your OS, so Patchou can look into it if need be (it might be a bug thats solved already).
Edit: please do not doublepost as this is against
forumrules, use the edit button (bottom of your post) instead