Endless Loop of Updates with Thunderbird 60.0 Linux 64-bit

After installing Thunderbird 60.0 64-bit for Linux (via the download link) in my /~/bin/thunderbird folder, I get a continuous loop of attempts at installing updates on Thunderbird, but nothing actually gets updated. These are the only errors in the last-update.log file that seem relevant: INISH REMOVEFILE Throbber-small.gif FINISH REMOVEDIR isp/ non-fatal error removing directory: isp/, rv: 0, err: 39 FINISH REMOVEDIR icons/ non-fatal error removing directory: icons/, rv: 0, err: 39 FINISH REMOVEDIR gtk2/ non-fatal error removing directory: gtk2/, rv: 0, err: 39 FINISH REMOVEDIR fonts/ non-fatal error removing directory: fonts/, rv: 0, err: 39 FINISH REMOVEDIR extensions/ non-fatal error removing directory: extensions/, rv: 0, err: 39 FINISH REMOVEDIR dictionaries/ non-fatal error removing directory: dictionaries/, rv: 0, err: 39 FINISH REMOVEDIR defaults/pref/ non-fatal error removing directory: defaults/pref/, rv: 0, err: 39 FINISH REMOVEDIR defaults/messenger/ non-fatal error removing directory: defaults/messenger/, rv: 0, err: 39 FINISH REMOVEDIR defaults/ non-fatal error removing directory: defaults/, rv: 0, err: 39 FINISH REMOVEDIR chrome/icons/default/ non-fatal error removing directory: chrome/icons/default/, rv: 0, err: 39 FINISH REMOVEDIR chrome/icons/ non-fatal error removing directory: chrome/icons/, rv: 0, err: 39 FINISH REMOVEDIR chrome/ non-fatal error removing directory: chrome/, rv: 0, err: 39 FINISH ADD updater.ini FINISH ADD Throbber-small.gif FINISH REMOVEDIR distribution/ non-fatal error removing directory: distribution/, rv: 0, err: 39 FINISH REMOVEDIR distribution/extensions/ non-fatal error removing directory: distribution/extensions/, rv: 0, err: 39 FINISH REMOVEDIR distribution/ non-fatal error removing directory: distribution/, rv: 0, err: 39 FINISH REMOVEDIR distribution/extensions/ non-fatal error removing directory: distribution/extensions/, rv: 0, err: 39 succeeded calling QuitProgressUI