I using the latest Sequoia and MailMaven 1.1.6. I upgraded to 3.3.1 this morning following the usual rules. On relaunch MailMaven appeared not to launch SpamSieve, stopped and required force quitting. This happened three times and was not cured by launching SpamSieve before MaiMaven. The cure was to restart my (Intel) iMac. Previous SpamSieve upgrades have been fine. Problem somewhere or just my ineptitude?
Thank for letting me know. So far we have no other reports like this. Did you use the automatic updater or copy the file yourself?
If MailMaven is hanging, the developer would probably appreciate a sample log.