You can install the Addon Manager on any drive but, if it's an external drive, it must be formatted in NTFS, see here:
http://www.fsdreamteam.com/forum/index.php/topic,26874.0.html
Well, that's cool. But while I have addon manager folder/files on my F drive and trying to open the installer or the update installer it doesn't open
The only way for me to resolve it to open is to copy the EXE file to the Addon folder on my C drive (default installation that it gives as all) run it, opens all fine and 10 other files appear in the Addon manager folder on the C drive, then copy all that to the Addon manager folder that I have on the F drive and after that, it does open
but I have to repeat it every day.
When I open the installer file on my F drive it opens then close it down again and I do see the installer2 exe file there but it's broken. also, it's NTFS