Ever since I have installed Trados 2017, each and every time I open a file in the editor after the program start-up, I get the error message "Key already exists. Parameter name: key". In this state, I cannot see the TM in the concordance window, nor the TB, nor the translation count at the bottom of the page: I am forced to close the file, reopen it, and then everything works. It is quite annoying having to do this every time I open Trados, and it is not the only problem I am experiencing with the 2017 version. Is there any solution to this issue? Thank you in advance.