Thank you for contacting us, and I'm sorry for the issue you are experiencing. The only thing we can do here is have you try installing a utility build of mSecure 4 to see if that will make it so you can retrieve your password. If you can, then you'll be able to use it to import your data into mSecure 6.
In order to do that, I'll need to get the email you use for your Apple ID, so you can download the utility app from TestFlight. Please send me an email at "email@example.com." After you send it, respond here and I'll get back to you with further instructions.
I just found your email and responded to it. We'll keep our correspondence via email from here on out.