@BreLeB 

I had similar situation once. 

Bring PC and that Satellite Deco close to each other (PC to Deco, Deco to PC - does not matter), so that they can see each other and PC can connect to that Deco. After that, you should be able to undo preferred connection setting for PC.

  @BreLeB Thanks, that's pretty much where I'm at now, unfortunately both units are somewhat hard to access but I can't seem to get it to undo any other way. I'm going to try taking the deco over to the computer as that's somewhat less complicated (it's still mounted inside of a cabinet that I'll have to empty to get at but it's easier than taking the computer out of the crawlspace...

Thanks again

  @BreLeB 

In theory, if PC can't connect to Deco, it should connect to another Deco. That's why it is called "preferred connection" and not "mandatory connection." Occasionally, that might not work. 

Try this if just moving them close to each other is cumbersome:

Power off that Deco. Keep it powered off.

Reboot PC.

Wait for about 5-10 minutes.

See if PC reconnected to a different Deco and you now see that PC in Deco app.

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Alternatively:

Delete that Deco from Deco mesh. It should reset preferred connection setting (in theory). Reboot PC. See if PC will reconnect to a different Deco in up to 5 minutes.

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If that does not work, moving Deco and PC close to each other, so that PC appears in Deco mesh and its connection preference is configurable again - is the only option I can think of.