I upgraded to the latest emClient today (1/25/2018) from 6.0 to 7.1. The upgrade did not retain my Archive Email settings. I manually reset them to archive every 7 days, and archive all emails greater than 180 days, selected a scope of All Email Folders, and ran archiving. My lost archived emails did not reappear. Where are my old archived emails, and how do I get them restored to the archive folder?
After upgrading, when you started eM Client, you should have been prompted to import from version 6.
If you chose to skip the import, or if you were not offered the option, you can import the archive manually.
Go to Menu > File > Import > eM Client 6.
If you don’t want to import the settings, rules etc. untick them.
Then you need to select the folder where your eM Client 6 database was stored. The default location is C:\Users_username_\AppData\Roaming\eM Client.
You then get the option of which folders you want to import.
Hope that helps.