I have re-exported my game (created in construct 2) but now admob adverts are always in test mode. Has been on google play for 3 months working fine until I updated XDK and re-exported the game.
Adverts are not in test mode in construct 2 settings. Have done the exact same process to export the game as I always have.
Any help on how to get out of test mode would be lovely.
Sorry, but no idea what you mean by "test" mode. I'm assuming it means your game it pushing test adds and not real ads?
This is likely something to do with the admob plugin you've added. We do not have expertise in the many third-party plugins. I recommend you search Stack Overflow for "problems with admob test mode cordova phonegap app" to find some relevant suggestions. The XDK creates standard Cordova (aka PhoneGap) apps, so whatever works for those will generally work with the XDK.