Both the Trainer and Editor are designed for Single-Player modes ONLY!!!
IMO asking for multi-player support shows poor form.
I was able to use and save a value of 39.
I initially tried using 99 for my bank and the same thing occurred until 0x90 mentioned the size/amount limit
Its not a problem with the editor itself, its a problem with virusscanners seeing changed code as a virus however they want to call it.
Only in this case you have to exclude the editor in your virusscanner as well as in the online realtime scanner of your antivirus program.
As soon as you run the editor it also makes this file
in the following folder.
The file is named ~Mnn133.tmp
SO you also need to exclude that file in your virusscanner
as well as in the online realtime scanner of your antivirus
After done that your good to go to use the editor.