In my opinion, that'd actually make it more difficult. There should just be a folder "FTBBETAA" in the folder you put the launcher in.
Moving it to appdata would make it more difficult to find.
The actual download on the jar needed to be set executable. I think they just need to add like one line to chmod it.
About where this should go, I thought that was for the most critical errors. If I posted there I'd probably get a response such as "use properties->executable or chmod". I...
The launcher is great and works really well. I'm planning to use it when more mods are out.
But also, there's a small thing I'd like to see fixed (should just be 1 line of code in the updater):
Firstly, I'm sorry if this is the wrong place - it's the best I could find.
Anyway, to the...