I had Krita 4.2.1 but it sporadically crashed to the desktop without doing an "Auto-Save". So, I recently upgraded to Krita 4.2.3. Now, when I have a PSD file open and I go to "Image" and then "Scale Image to New Size", I can type in the new size but the instant I hit the save button, it crashes to the desktop. When I reopen Krita and the file, no changes have been made.

I'm running Windows 7, SP1 Home Edition, 64-bit. I've been using Krita for 4 years. I downloaded & installed the Nightly Krita Build 4.2.4 and it still does the same thing.

I cannot reproduce that. I doubt that it's important that you have imported a PSD file, but the image size, color model and channel depth might be relevant.

Please make a crash log: https://docs.krita.org/en/reference_man ... ml#dr-minw and make a bug report.