@eljuno makes a good point and has in related threads provided links explaining why 1PW6 won’t work.
@Chippewa, I tried the already-installed extension in one of my Release profiles and it reconnected to 1PW7 fine, so I switched to a profile that doesn’t have the extension to try the installation process. HOWEVER, 1Password now offers what appears to be a standalone extension that might obviate the whole connection thing.
If you still want to use the application-connecting version, then it sounds like you’ve already tried the steps from here. However, another post by @sfobrian right under that solution suggests that you can:
- Open Activity Monitor
- Look for and force quit any processes belonging to 1Password
- Reinstall per @ElectricSeal’s steps linked above and connect
Let us know which way you go and how it turns out.