Garmin .fit file
If you have problems with the auto fix, send me a mail. I cannot respond to every mail but I will take action if the site has been broken. This site is used over the 100.000 times to repair fit files.
Edit with notepad
You can manualy edit the txt file and upload this file below to convert this back
to .fit file. With manual edit you can correct
Garmin .csv file