Unfortunately, or fortunately, there is no way to reset your mSecure 4 login password. However, since you still have access to mSecure 4 on your device thanks to Touch ID, you can fix this issue by either syncing your mSecure 4 information to another device that has mSecure 3 or 4 or by simply setting up Dropbox syncing in mSecure 4, changing the default cloud sync password, reinstalling mSecure 4 on your device, and setting up Dropbox syncing again in mSecure 4 after you create a new login password. This all might sound complicated, but it should be relatively easy and quick.
Important Note: Please update to mSecure 4.5.4 before continuing
First, use this guide to learn how to set up Dropbox syncing in mSecure 4: https://support.msecure.com/support/solutions/articles/36000028452-dropbox-syncing-ios-4-5-4
After you set up Dropbox syncing in mSecure 4, make sure to change the cloud sync password. The cloud sync password is set up using your mSecure 4 login password. However, you can always change it to something else.
and follow these steps afterward:
Afterwards, make sure to turn Touch ID on again if you’d like to continue using that feature.Lastly, set up Dropbox syncing in mSecure again to sync back all of your information and don't forget to set up Touch ID again. You will then also be able to move to mSecure 5 since you'll know your mSecure 4 database login password.