I have a macro that works perfectly in earlier versions, but since upgrading
I can't seem to figure out the settings. When I attempt to run the macro, I
get the error
"..that macros have been disabled. To run reopen and choose enable macros."

The macros enable setting is already enabled.
The folder where the spreadsheet resides is set as a Trusted Location
I have set up my personal digital signature. However, I do not know how to
install the certificate in the trusted root certification authorities store.
I can't find instructions on this.

Help is appreciated.