I think you installed the 2016 on the 2014? It can create interference. The easiest way is to make a silly look at the 2014 settings if it still works or maybe you have already done it and uninstall it entirely from the 2014 and do a full installation from the 2016.
In the activation window, you created this file with the Save button
You have to send your file to activation@solidworks.com, the activation server, will send you a file by reply to the email, the file will be called: swactivateresponse_....
You have to take this file and in the activation window, you have to click on open.
Everything is described at the end of page 6 of @Azrod's document