I purchased 2014 Trados Studio, and installed 2015 trial version which automatically made 2014 license inactive.  After my 30-day trial period was over, I wanted to reset my 2014 license, but the 2014 studio (along with its license code) disappeared from my license page.  So now when I open 2014 studio, I see a 30-day trial license to activate.  On the other hand, my 2015 trial license code is still visible on my license page and I'm unable to deactivate this.  Can I keep using the 2014 studio that I originally purchased, or have I lost it for good?