This will walk you through how to fix the issue where the integration stops working. 


First, go to where the dll files are saved: this should be something like C:\User\"userName"\AppData\Roaming\Microsoft\AddIns.


If you don't have the dll files, they are attached at the bottom of this article; make sure you grab the right ones for your Excel. You will need to put them in this location: C:\Users\"userName"\AppData\Roaming\Microsoft\AddIns.


Rename the swiftxl9.dll to have a space before the 9, so it is like this: swiftxl 9.dll.  


Now register the dlls using cmd.


Launch cmd in admin mode and enter:


        cd C:\Users\"userName"\AppData\Roaming\Microsoft\AddIns  


Press Enter and run this command:


       regsvr32 psconnector9.dll   


Now run this command:


       regsvr32 "swiftxl 9.dll"   


That should resolve the issue.