Erp.. you'd probably be better off posting in the other thread so the developer of the GUI can answer. As I said I've never used it. I know it requires the .NET framework (so do the map editor, and particle editor in the forge tools) so you might need to get that from Windows Update.
If you don't have a lot of files to convert, here's how it works in DOS prompt:
- First, go to start > run > cmd to open the prompt
- Navigate to the folder where you have convertdata.exe by using "cd" (change dir), for example:
cd c:\forge tools\
will change your active folder to c:\forge tools (so I recommend you put the program and the files you need to convert in a very easy path to save typing time!)
- run the program by itself and it will show you the command line syntax, so just type convertdata.exe
Since it needs command line options, that will show you what they are. For example, if you wanted to convert an entity file (let's say CAPITALSHIP_TECHBATTLESHIP.entity) from text to binary, you'd type:
convertdata.exe entity CAPITALSHIP_TECHBATTLESHIP.entity CAPITALSHIP_TECHBATTLESHIPtext.entity
So you have the type of file (entity), source file, destination file. If you're converting backwards, from binary to text, it'd be
convertdata.exe entity CAPITALSHIP_TECHBATTLESHIP.entity CAPITALSHIP_TECHBATTLESHIPbin.entity bin
Notice the bin in the end to specify what you're converting from. Technically in the first example you could have put "txt" at the end, but it defaults to it so you don't have to.