I don't think I've heard complaints about JD2's installer. Which might explain the issue with them, they might've intentionally borked the installer to get everybody to move to JD2. Which would be world class stupid....
What do you mean by wouldn't run? I just updated mine the other day and I've noticed a few hosts that I'm sure worked before the update are tossing me plugin out of date errors now It's still working though, and it's just a handful of hosts.
*PSA* Wii Redump collector's can now unscrub ISO files. So scrubbed games can now be verified. You can find the program to do this here
You could try JDownloader 2. It's currently in beta but is way better than V1.
Jdownloader 2 also has adware