Excel won't start

[RWilkes]

Anybody know of an Excel update released recently (5/24 or 25) that causes Excel to crash?
One of my clients using Office 365 was using a spreadsheet on Wed and all was OK.
He got a notice that his 365 susbscription expired. He renewed it and now that spreadsheet and Excel choke on startup:
"Excel won't start". Only option is 'Cancel'.

A couple other clients, using the same form, but other versions of Excel (2016) have experienced the same issue.


The form runs fine on Excel 2010.
Users with Update turned OFF aren't seeing the problem.

Windows Update lists only one recent update KB 3150513). But turning updates OFF, uninstalling, and restarting Excel doesn't fix the issue.

This is a major problem for my client as this form is the basis of their business and they're currently unable to conduct business as usual.
Of course, I've searched the inet, but have yet to find any meaningful fix.

Uninstall and Reinstall Office doesn't help, as updates are loaded during install...and I want most of those.
Have tried "Office repair" but all that did was remove licensing info.

~~~~~
05/28/17
Well, a 1/2 fix. Excel seems to now "magically" have sorta fixed itself. At least it will open without complaining. Opening a spreadsheet is still problematic, though. Through trial and error and a bit of luck, have discovered this workaround:
1. Open Excel (from Start menu, NOT by clicking on a file).
2. Use Excel, File, Open to open the file.
3. The "Microsoft Excel has stopped working" with "Close program" button will appear. Select "Close program"
4. Wait about 10 seconds.
5. From Start Menu, Open Excel again - This is a very "touchy" step and has been inconsistent...Keep trying until Excel opens with the "Show Recovered Files" on left side of screen.
6. Click on "Show Recovered Files" on left side of screen.
7. Click on the spreadsheet being opened from Available Files list.
8. The spreadsheet should be displayed.
9. Close Document Recover window.
10. Work as usual.

What a kludge!
FYI: I've selected the "Show what's been fixed" entry in the recover window and I'm told "Nothing was fixed"! Go figure.