GA SJDXA,
Anyone that has updated N1MM+ to the newest release that came out on Tuesday, 21 June 2022 and is have issues getting a Runtime Error when they close WSJT-X, there is a patch for this error. It can be downloaded at:
 https://n1mmwp.hamdocs.com/.../available-window-change.../

Download the patch, install it and it will fix the RT error. I've done it and it works as it should now.

RET