Download the Authy app to your mobile phone or desktop. Any Authy App set up with the same phone number as registered to Coinfloor will automatically list Coinfloor in your 2FA accounts list.
SMS 2FA can then be disabled by going to My Account---->Profile and Settings. Untick "Send 2FA token via SMS" and click update.
The next time you log into your account, you will need to use the codes generated by the Authy app.