Family Historian User Group

When I download and attempt to use v4.6 of this , I get the message
"This Plugin runs the Ancestral Sources application.
Only one copy must be installed, but multiple copies exist in:
C:\Proram Files\Ancestral Sources\Ancestral Sources.exe
C:\Program Files(x86)\Ancestral Sources\Ancestral Sources\Ancestral Sources.exe"
How do I delete the earlier copy? I can't find it in File Explorer

Yes, you have installed AS 32-bit into Program Files(x86) and AS 64-bit into Program Files.
So use Windows Control Panel > Programs and Features and there should be two entries for AS with dates installed.
Select the earlier one and use Uninstall option at the top.

If not sure how to open Control Panel just enter that into Search box and select from list above.

BTW: You should never delete installed Program applications via File Explorer, but uninstall them as explained above (other methods are also possible).