13.2 will remember last used setting for Display all Results.
You can grab the beta here if you want Toad for Oracle 13.2 Beta.
Keep 13.1 installed if you download the beta. Beta only works if most recent production version is also installed. The beta will grab settings from 13.1 the first time you run it, but from that point forward, 13.1 and beta will each keep their own settings.