desactivation/activation

This is my situation

I can use trados in 2 computers (although I bought a licence for 1 user).

My SDL account's state is : 1 USER  0 IN USE  1 AVAILABLE

I want to deasactivate Trados in both computers because I need to install it in a new one. 

It is imposible, only error messages, no solution. (on line, off line... )

Please help me to desactivate Trados in my computers so that I can activate if in a new one.

Thanks

best regards

Élise

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