So i was thinking especially now when your still in the SVN state.
Wouldent it be worth to add an Auto update feature so whenever a new
release has come the program notifyes the user of the program?
Or you could run manual update checks from the menu?
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As for gba linking, why not activate it with a debugger and the users could to enable it and use and send if the logs for you. Could save a lot of time and users could do help test it to. Like i said just a thought.