Thank you for contacting us and I'm sorry about the issue you're experiencing. mSecure 5 is a brand new app, and mSecure 5 is the first and only version of mSecure to use an account system. Please create an mSecure account to get started in mSecure 5.
I would recommend starting with mSecure 5 on a device that has the previous version so that mSecure 5 can walk you through a migration process: https://support.msecure.com/knowledge-base/migrating. Otherwise, mSecure 5 can restore from a .msim backup file created in the previous versions: https://support.msecure.com/knowledge-base/msecure-backups
Thank you very much for your time, and please let me know should you need further assistance.