Deactivate a 2019 license and activate a new 2019 license

Question

Hello, I want to activate a new license of 2019, so I have deactivate the old 2019 license yesterday. And I have been confirmed that the old license disappeared from the list of our purchased products. 
 But, today, when I reinstalled 2019, it still works with the old license, and cannot be deactivated.

Sorin Perta · Answer

Hello Keppi Li 
 Before reactivating the new 2019 license please follow the below steps: 
 
 Close Studio. 
 Go to: C:\ProgramData\SDL\SDL Trados Studio\Studio15\Data 
 Rename the file Studio.lic, e.g. to Studio_old.lic. 
 
 Note: If you can't find the path above, open Windows File Explorer, click on View and check "Hidden Items" checkbox. 
 Thank you, 
 Sorin

Trados Portfolio > 2. Licensing and Installation

Deactivate a 2019 license and activate a new 2019 license