Thank you for contacting us Duncan. I believe the problem here is that you have some old data from before your recent password change somehow hanging around in your iCloud account. This is not difficult to fix, but before we do anything, I want to confirm that your data still looks right in whichever device you used for the upgrade. Are you still able to open mSecure 5, unlock the app and view your information? Also, how many and what type of devices do you currently have signed in to your mSecure 5 account?

@Kristen This is happening because the sync data in Dropbox is out of sync with the account data stored locally on your device. In order to fix this, simply open the "Apps > mSecure 5" folder and then delete the folder that's named with what appears to be 10 random characters. You should be able to sync after that.