Tried both of these. (And yes, my input file is actually named input.moflex)
C:\Users\MyUserName\Desktop\MobiClipDecoder>mobiconverter.exe -d input.moflex output.avi
OR
C:\Users\MyUserName\Desktop\MobiClipDecoder>mobiconverter.exe -d "input.moflex" "output.avi"
Thanks
--------------------- MERGED ---------------------------
Wait, I think I got it. Apparently my Moflex became corrupted and that was causing the issue. I'm trying a different one and it seems to be converting just fine right now. Thanks for your help!