The spinning dots means your lightshowprohelper.exe service is not running. I had some issues with it last year not starting up reliably and would manually run it and be fine. I worked with one of the developers and we diagnosed part of the issue to using a network drive instead of a local drive and that has been an issue they have not figured out since it should not make any difference and appears to be related to how windows connects to a samba device and some authentication windows does not send that samba wants.. (that is my guess reading some logs on my linux server) anways that's an easy one. With the other issue with wierd errors, that's most likely corruption in the download. Run an MP5 on the download and post the hash here and the program you used. A couple of us can check our download we have sitting. after that I would reinstall some core DLL's up upgrade them, something corrupt.