- Fix poor phrasing when reporting why an upgrade can not be extended
- Fix "Leave notify conversation on submit" applying to the recipient and not the sender
- Fix 'extend' button not working as expected
- Fully fix "Leave conversation and ignore future messages" option for user upgrade conversation notification
- Harden sending notification conversations to avoid conflicts with Conversation Essentials
- If Conversation Essentials is installed, require Conversation Essentials v2.0.3+
- Fix "Undefined index: sv_exup_email_on_expiring_expired_upgrade" by installing default registration settings on upgrade instead of just install.