i hope someone had similar trouble

[Auroraw8]

When I opened my last saved excel 2010 file, it showed: This file is not in a recognizable format. I applied Open&Repair feature, it didn’t assist. I made some another things, no results. Any tip, for restore excel data…

 

[Special-K99]

Go to one of your backups.

 

[Auroraw8]

Go to one of your backups.

Unfortunately, I don't have any backup.

 

[FDibbins]

1. In Windows Explorer, try copy the file to a new location, rename and try and open again
2. try opening the file from Windows Explorer, instead of excel