Windows Insider Office 365

Hi Carl, that's a real drag, having to re-install everything, been there recently myself after a blue-screen loop! Not sure if this helps but here are some instructions:

Download and Install Office - https://support.office.com/en-us/article/Download-and-install-or-reinstall-Office-365-or-Office-2016-on-a-PC-or-Mac-4414eaaf-0478-48be-9c42-23adc4716658

Opt-in to Insiders - https://products.office.com/en-gb/office-insider?tab=Windows-Desktop

If you want new features as soon as possible then Insider is for you but for fewer bugs and issues Monthly Channel (Targeted) is the way to go.

The above instructions won't work for business customers by the way, that's covered here - https://support.office.com/en-us/article/how-office-365-commercial-customers-can-get-early-access-to-new-office-2016-features-4dd8ba40-73c0-4468-b778-c7b744d03ead.

Hope you get everything sorted!