Thank you for contacting us. Unfortunately, we don't have telephone support at this time, but I can still help here in the forum. I'm hopeful that whatever is happening here is a simple fix, and I'll send instructions when I figure out exactly what's happening.
I just tried to find your mSecure account with the email you are using here in the forum. However, I couldn't find an account with that email address. This would indicate that you are either using the older version of mSecure, or you using a different email address for your account in mSecure 6.
Do you know which version of mSecure you are using on both your phone and your iMac?\ When you look at the app icon on your devices, does it have a bright blue background behind the key or is the background a very dark blue color?