for anyone trying to use the new geoconvert tool but are getting confused with the tutorial, here are the basic core steps needed to successfully make your scenery. I will fine tune the tutorial to make it a bit simpler to read shortly.
1) obtain your FSET files (you will only need the image files and inf files for the tool)
2) place the image files and inf files into the 'input_aerial_images' folder (disregard all other files produced by FSET, you don't need them). Do NOT rename any of the files made by FSET.
3) use the inf2tfw application; point to the 'input_aerial_images' folder where you have the image and inf files located.
4) make your TMC file: Use the sample as a grid for your project, make your levels (example: levels 9-14), use the long/lat coordinates shown within the FSET tool, this gives you the corner coordinates needed for the TMC file. You must convert the coordinates by following the wiki here (going to the conversion site shown), only use the coordinates left of the decimal and the next 2 after the decimal (example: -118.36). Note: the same lines you have for your first level you can copy/paste for all levels thereafter.
5) either run the tool by using command line or you can make a batch file to do this step. Either way works the same and is simple to do.
6) when the tool completes, make a folder for the resulting files custom for your project and place it into the your 'Documents\Aerofly FS 2\scenery\images' folder
7) run Aerofly and locate your new scenery on the map
choose an elevation you wish to start at (or make an airport file for starting points), ENJOY your new scenery.
I hope you have success.
If the tool crashes;
for now, make sure that you have enough memory for your project and make sure that nothing else is running that takes up resources.
There may be a bug that was somehow missed that crashes the tool but we tested this a lot with no issues at all. If there is a bug, it will be certainly worked on.
Note: if the tool completes with no files, your TMC file likely has an error in it. The most common one is using more than 2 numbers after the decimal point for your coordinates.
I hope this helps a little bit.