Wow, great find Ken! I counted at least a dozen features that Directory Opus either copied or is finally catching up to XYplorer 5.x on. Wonder if they read the Forum and study the XYplorer betas? $50 (which is probably $40 USD) is a lot compared to XYplorer's Lifetime license, small size, portability, XML settings, System integration, etc. Like Darwin, I bought DOpus 6, skipped 7, and spent another $90 buying everything I wanted for version 8. They really should sell just one complete version. If they want to modularize it, then fine, but start with the portable/micro version and go up, rather than extracting features that should be part of every copy. (I say this because it makes for unfair comparisons with other file managers.)
Directory Opus is one of those programs that are so addictive that it really makes Windows a lot of fun. I spend the majority of my day among the browser, text editor, and file manager.