WinOrbit uses a number of required and optional files. Here's a list.
Click on the file name to read more about it:
Absolutely required - the program will not run without these.
Very desirable - These will save you a lot of mouse and keyboard work!.
*.2LI / *.TLE
Optional - These will created by the program at various times.
Optional - You may provide these if you want their features.
*.VEC / *.VIF
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