I have uninstalled the latest version 10 again deleting all email content. I installed the latest version 9, and this has been downloading all content for hours now with no issues.
Normally in that situation to avoid going back to V9 if nothing fixes it, if you don’t have a working eM Client V10 dated backup.zip file to restore, you can “close eM Client” and then “rename the current hidden mail database folder” to eg: eM Client-Old and “then reopen eM Client” which then will create a new database and setup as new.
Then once working, either create a manual backup regularly via “Menu / Backup”, Or setup the automatic periodic backups via "Menu / Settings (Preferences) / General / Backup) which by default go to your “Documents / eM Client” folder. You can then easily restore anytime if you have issues in the future via “Menu / File / Restore”.
Note: If you do regular manual backups, click the dropdown arrow on the right of Refresh and click Show Operations to see when that’s completed.
What you are not understanding is that a complete uninstall of version 10 foillowed by a complete deletion of “%APPDATA%\eM Client” and all content under. I performed a new install of the latest version 10 after doing this. A brand new install again results in a crash before downloading all content from three mail servers. Version 10 simply does not work. Others are making this same complaint. I am not alone.
What you are not understanding is that a complete uninstall of version 10 foillowed by a complete deletion of “%APPDATA%\eM Client” and all content under again results in a crash before downloading all content from three mail servers. Version 10 simply does not work.
As you have then tried a brand new database and also tried uninstalling and reinstalling eM Client with the latest V10, then you would need to have your eM Client logs investigated by eM Client Support to determine why it’s crashing. I personally cannot replicate those same SQL database errors in V10 using PC or Mac with 4 different types of server based mail accounts.
So suggest if you have a current active paid Pro or Personal version, and try upgrading again to V10 at a later date, if you still get the same SQL database errors, go to the following eM Client VIP support page and log in and lodge a support request to be investigated.
The only other thing I can suggest is to eg: try disabling all non OS user startup related resident programs and then reboot and see if you still get any crashing in eM Client. As could possibly be something starting up running resident is interfering. Apart from that someone else on this free community forum might have other ideas.