I have just had a look on the site and this is a beta with the hope of the full version not coming out until sometime early next year.
It would be difficult to know where the problem is with cleaning as beta softwares, as you know, can be unstable, and this seems to be the case at the moment.
I know some schools are having to use this software which by the way has DRM protocol.
Also the beta has no ads but from what I can see, when the full version come out (free) it will pay for itself by "providing context-based ads in the user interface of the live version" OR you can pay and opt out of the ads!
By the way, welcome to the forum