You could have a font size specified that is not an exact match with Pronto Maestro.
Check your 9400 config if you are using Custom Fonts and ensure that if you have a label where the Pronto Maestro font is being used that it is set for example to 10 points and not say 56 points which is not one of the font sizes allowed.
Once you get past this, you can drag and resize buttons. However, the 9600 is a 640x480 landscape remote which is a screen size 4X of the 240 x320 portrait 9400.
More than likely you will find yourself redoing the graphics anyway.
If you want to email me the file to the address on my RC profile and give me some instruction as to what options/buttons you are clicking in PEP2.
Please don't just send me a file, send me the config file plus a file with text instructions.