I would like to not be a polygamist with my phone/computer. I would like to have Thunderbird Supernova only on my android BLU G91 phone and not K9mail also. I would like to start and stay with supernova. on my google store app, it refuses to allow me to see the thunderbird supernova app to install and only offers me k-9 mail. How do i avoid K-9Mail and later having to switch to Supernova, if i can start at the beginning with Supernova? Thank you.....b³