Brett --
There's a problem that affects some users when installing.
Try this: after unzipping Thor.Zip, double-click on Thor.App in that folder. (Try this instead of executing Thor.App yourself).
During the installation process, if it works properly, the "Check For Updates" form should appear and you should be able to install the three basic projects (always needed by Thor) as will as any other projects you are interested in. (I suggest GoFish,
for sure).
No problem on this end helping you get Thor installed -- I did not pour all that work into it so that people would be unable to use it.