[Add 3rd device to existing 2 devices licence]

Hello all, 

 

I own a licence for a 2 year, 2 devices Total Security protection, and just bought a 3rd pc. 

Since i just updated my 2 devices license 2 months ago, i dont mind upgrading to a 3 device  plan and lose the 2 months for that device. 

Is that possible, and i just pay the difference between the 2 and 3 devices plan, and they all last for a further 22 months? 

 

Many thanks