I’ll be damned.
I actually went and grabbed an old install of Ioncross from an xp box I had and just dragged the whole folder onto my win7 machine. As long as I ran it in administrator mode it worked with no problems. So obviously it can work properly in 64bit. So why the hell wont the stupid installer function?
If anyone is having issues with Ioncross and wants me to host the post-install program folder, just let me know. I didn’t check the version, but it’s probably older than the current build, since my xp machine was last used for freelancer years ago. But any working editor is better than no working editor, yes?