Why are all sheets and ribbon hidden and disabled?

[hoacvxd]

I have some excel.xlsm files that have all the sheets hidden and the ribbon disabled.
Not sure what I did to lead to this.
Please tell me how to restore to normal.

[#2 · Accepted solution]

Hi @hoacvxd 

to unhide a workbook, just got to menu "View | Unhide" and select the workbook that you want to see:

[#3]

Thank you.