Well Chrome has finally done it!!

[king1]

Chrome version 138 has turned off all my manifest 2 extensions and won't let me re-enable them...

Thanks to a post here
https://www.reddit.com/r/uBlockOrigin/co...hrome_now/

The next best work around is to modify the 'Target' field of the chrome shortcut - modifications in bold

"C:\Program Files\Google\Chrome\Application\chrome.exe" --profile-directory="Default"   --disable-features=ExtensionManifestV2Unsupported,ExtensionManifestV2Disabled

How long this lasts is anyone's guess - bit of an irony calling something being disabled or unsupported as a feature me thinks...