i posted the fix a few pages back. will have to do until csp/sinplygon do something their end
edit - ive copied and pasted it here again for ease
SIMPLYGON FIX
The new Simplygon (9.2.7.000.0) doesnt work with Content Manager. Those of us using a Free Licence are forced to upgrade to the latest version hence why downgrading to an older version wont automatically work.
Clear the generated Lods cache in CM
Uninstall Simplygon and delete all folders on your drive and documents.
Restart Computer
Download and install an older version of Simplygon from here:
https://github.com/microsoft/Simplygon-DCC-Integrations/releases
Run "SimplygonLicenseApplication" which can be found in the install directory.
Select "Install Simplygon Title Evaluation Licence"
This is a temporary solution until its fixed. Each email address used will give you 30 days usage of Simplygon. Not ideal but its working again.