If they stopped manufacturing the hardware version, pushing for users to move to the software version makes sense to me.
Remove the current one you have attached to your account, in your account management page. Then follow the links/instructions to install/activate the mobile app. I don't remember it being very complicated to setup at all and was quite reliable as far as I could tell. Most issues that get reported are due to phone updates breaking the app or people losing their phone, and forgetting their Emergency Removal Password (which is intended for that type of problem.)


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