I've upgraded to 3.0.96 on a Window 10 machine.
I download an old LS1 file from 2.24 (file size 467KB), make some changes and save. The new file is 231KB and when loaded into the PCM (it takes it) the car is dead.
Is the file size in v3 half the size of the old file or is something going wrong? (Is it v3 or Windows 10)?