Hello, After some issues with v78 update I downgraded to v68 but I'm not happy with this solution. I, personally, prefer the latest versions of the software and far as I saw (on a virtual machine) v78 it's pretty much stable as a new/fresh installation (and there I don't have same issues as on the working machine after the update). I saw many recommendations as: "the best option is to create a new profile, [...] add your accounts, and then transfer mail, address books etc. from the old profile to the new. It's a bit more work, but avoids issues with using older profiles in updated versions of TB" And I will like to try that but my question is "how"? To create a new profile is simple, understood. But how to "transfer" mails to have all the mails right on the new profile w/o duplicate or missing mails? I have multiple accounts - some pop3 (so then popstate files from old profile matter to not download again all mails) other are IMAP - here I can subscribe again but many mails will be processed again. I have many filters so also msgFilterRules for each account matter if I want all to work fine. So how to create a new profile (or a new installation) but still to have all "old settings" back. Many thanks in advance!