If you installed the beta program into its own program directory (choice 1 above) and you used a <a href="https://support.mozilla.org/en-US/kb/dedicated-profile-thunderbird-installation">dedicated profile per Thunderbird</a>, then start the release version of Thunderbird and it should use your release version profile data. If you no longer want to use the beta version, and do not need any of the beta data (address books, local folders, pop folders, etc), and wish to remove the beta data and beta program from your system:
Si tu ha installate le version beta del programma in su proprie directorio del programma (selection 1 supra) e tu ha usate un <a href="https://support.mozilla.org/en-US/kb/dedicated-profile-thunderbird-installation">profilo dedicate per Thunderbird</a>, alora lancea le version stabile de Thunderbird e illo usara tu datos de profilo del version stabile. Si tu non plus vole usar le version beta, e non besonia de alcun datos del version beta (libros de adresses, plicas local, plicas pop, etc), e vole remover ex tu systema datos e programma del version beta: