Drawing will not open in pinned icon

[jk1173]

I had Architecture 2021 installed.  I installed Map 3D 2021 this morning and now my drawings won't open from Windows Explorer in the pinned Architecture taskbar icon anymore.  Instead, they open in a separate icon at the far right.  The tab that opens says Architecture, but when I right-click this tab, it says it is Map 3D - see below.

How do I correct this weird behavior?

[pendean]

Windows defaults to the last variant of AutoCAD you used.
If you want ARCH, start it up first, then OPEN your file, QSAVE and close. It will now default there UNTIL you open MAP3D, then you have to start over.

Or get in the habit of starting the program you want first, then opening your DWG file.

[jk1173]

I found that trick in the forums earlier to set the default and that fixed the initial issue I had but doesn't address why the "wires are crossed".  Arch is what is opening the file; it's just that the taskbar is showing me that Map 3D is what is opening it.  I restarted thinking Windows might straighten itself out.  I assume there's a glitch in the registry - guess the lesson is only one AutoCAD program per computer.  Fix one thing and break another.

I'm so used to just double clicking the files in explorer but guess as long as there's 2 AutoCAD programs, that'll have to end. 

Thanks for the tips.