So quick update, immediately after posting my response... I re-exported all my PNGs with Gimp, but tweaked some of the settings to reduce the metadata. I unchecked the options: Save Exif data Save XMP data Save IPTC data Save thumbnail Save color profile Disclaimer: I have no idea what these settings do. However, so far all my icons have stopped disappearing. I can close and re-open AIDA64 over and over, and all my icons are there. I re-tested thi
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