We've recently updated one of our software features with new functionality. Most of the source code for that feature has been rewritten with compatibility in mind, meaning that if the user upgrades to the new version, he will only see the awesome new features.
The conversion works for 98% of the users. The other 2% will have done something that was possible due to "errors" in the previous design which has been fixed, and they will have to update their settings before the feature will work again.
How do you inform those users that they should check their settings after upgrading?
I see some multiple solutions and I was wondering what would the best course of action be.
- Make a note in the change logs, stating that every user should check their settings after installing
- Show a one-time only pop-up after launching the program after the upgrade
- Show a one-time only pop-up after using the feature for the first time after upgrading
- Don't inform, it's only 2% of the user base and they made use of design-errors that shouldn't be possible in the first place.