Dear friends!
I’m very satisfied with the present version of my eM Client, but time to time comes the message, that new version is available, when I plan to upgrade?
From my side “never”. Is any possibility to turn off the caution?
If I want, I’ll look after for new version in the case of. 
You can just postpone the upgrade for a month.
We don’t really recommend it because there are always fixes and other improvements, but if you have a Pro license, please open a support ticket and we can disable upgrades completely for you.