Extensions

I haven't really been paying attention to what does or does not work in Edge Dev and Canary recently. But today I had issues again with Canary. I completely cleaned out all the stored data and reinstalled it. I noticed that all the extensions disappeared. I went looking for them to replace the few I actually used and got a message telling me that they are no longer available for this version of Edge. I get the same message on Dev. But production Edge allows them to be turned on and added to.

Has anyone else run into this or am I missing something in the setting that change and I have totally overlooked.