I normally use two accounts on my OS X systems; an admin account and a user account. I do the downloads and install into the Applications folder as the admin. That is what I have done with the Qcad Professional that I bought.
But then I run the software from my user account. For applications explicitly designed for the mac, this works great. The user specific information (preferences, etc) are kept in the user's directories.
I have installed Qcad on my system this way. It runs just fine from my admin account. When I try to run it from my user account, the program starts and spins the little whirling wait wheel forever. I have to kill it with option command escape.
I suspect the problem is that the program is keyed on my admin account user name, because even when I unzip the download and install it my user account, it acts the same way.
I don't have a problem with this, I have a few other applications that don't play well under this scenario. But I'm not interested in buying a new version under my user account name. How do I handle this, if, in fact, that is what is going on?