can't open and install anything from download assistant

If for example on download assistant I try to open any product such as Halion, it tries to open, install, initialising then a window pops up with setup has stopped working. I have installed latest download assistant and trying to do the trail version of Halion before I purchase. For the life of me I cannot figure out what the problem is. Don’t know If i have something old on there that did not uninstall correctly and causing this to crash all the time. Very frustrating and would appreciate any solutions. I have just upgraded to Windows 10 but that has not made any difference.

Someone should please answer this. I have this same exact issue too.

Ya… Me too.