Hey guys, I found a way to get past the "Object reference not set to an instance of an object." error. :D
If you're using Apple computers, I suggest giving up.*
You will need to know how to save a file (With a format (.exe; .vbs; etc.)) in notepad. (This tutorial will only tell you how to save it as .bat (Batch file, via Windows' Command Prompt))
So first, open notepad
Then paste this command into the notepad:
start MultiFighter.exe
and save as a .bat file (With any name you wish to give it) into the folder where the Fighter is located
(You'll have to change the name of "Multi Fighter.exe" to "MultiFighter.exe")
Open the MultiFighter.bat AT LEAST 8-10 times per account. (Yay! You can now have more than One account using MultiFighter!)
Find the ones saying "Ready" or "Ready to Login" at the bottom of the logs.
Drag those to the side, as they are the ones that are ready to be used.
A "Thanks" doesn't hurt, ONLY if I helped you.
*Apple computers can't install .NET Framework, therefore, Multi Fighter can't be opened
And Plus if I DID help you, you're welcome!;)
EDIT: Gähn updated the fighter so you do not need to use this method anymore! Yay!