Seeing your reply, I tried adding via qr-code and it worked.
Tried to login 5 times and succedeed all 5 times 1st try. No more wrong OTP.
I was starting to be afraid to login in case I get locked out with Google Athenticator.
So it seems Aegis works just fine.
I have to mention that Aegis Authenticator is a free and open source app.
Indeed, the wording might use a refresh to indicate the user that other authenticators can be used also.
Thank you Joe.