To open a *.bin file in RGN_Tool, enable Section 1 then press 'Load' to browse for the file. Best update your version of RGN_Tool as well.

I guess in Windows you've maybe got the default program set as some media player for *.bin files. If you wish to make RGN_Tool the default, this should work regardless of which Win version you have: Right-click the *.bin file, select 'Open with' from the menu. If 'RGN_Tool' isn't in the selection left-click 'Choose default program' at the base and so on ... Or, click 'Properties' instead and change program using 'Open with' there. Then when it's set as default you can simply double-click a bin file and it'll load to Sect 1. I hope you're not using a Mac or i resign. This is gonna cost you many beers anyway, PC lessons weren't part of the deal. .....