How I view corrupted ai files?

1) Open the preferences file and look for the entry named "enableContentRecovery", change the value from 0 to 1. This turns on the feature.

2) Launch Illustrator and choose "File>Open". Select the file from which you wish to recover the roundtrip information.

3) Click "OK" while holding down the command, shift and option keys (control, shift and alt on Windows).