Remote Desktop 10.2.3 Database Creation Error; 10.2.1 runs fine; 10.2.2 crashes: how to find actual cause(s)?
For some reason, it looks like the new versions don't like some formats of the old application library. I made my work again after rebuilding the data in the library, forcing a kind of fresh install:

Delete the faulty app. (Microsoft Remote Desktop)

I rename the folder com.microsoft.rdc.macos
inside directory /Users/myusername/Library/Containers/ to something like old_com.microsoft.rdc.macos


e.g.:

mv /Users/myusername/Library/Containers/com.microsoft.rdc.macos /Users/myusername/Library/Containers/old_com.microsoft.rdc.macos


Reinstall Microsoft RDC and test.

If everything works fine, you can go back and delete the moved folder to just keep it clean. In my case Users/myusername/Library/Containers/old_com.microsoft.rdc.macos


Note: I bet if you only execute the step 2, while the application has been closed, it will work.