Really? I wonder why it's working as expected for you and not for me?
I guess it has something to do with the different operating systems.
I'm using 6.5.1 (rc2) on Windows 8.1. I use multiple monitors on my
desktop and just one on my laptop but it never remembers the
size/location on either
The script editor does open at the same size and location where you left it...
Well, just tested it on OSX 9 ans LC 6.5.1... opened the script editor, sized
it and put it in the topleft of the screen... closed it... opened it again and
it appeared in the same place... then shut liveCode down...