Hi Jim Fell
Could you clarify what MCUXpresso IDE version are you using? I would recommend you to use our latest Version 10.2.1
Also, could you go to the default locations of all your SDK installed and verify that there isn't any SDK_x.x.x_MKL17Z256xxx4.zip package on it? you can right-click and select "open default location"
Best regards
Jorge Alcala