The MD5 hash as generated by Cyberlink is valid because App Manager had no trouble downloading and installing the 2721 update this morning on my desktop.
Try rebooting and launching App Manager again. If you still get an error message, you may need to install it and run the original installer again. If you have Win 10, to uninstall it just right click on the Start icon and choose Apps & Features. You can speed up your search by typing in "app" like this:
Uninstalling App Manager will not affect any already installed DirectorSuite programs. It will also automatically update itself to the latest version even when you reinstall an earlier version
YouTube/optodata
DS365 | Win11 Pro | Ryzen 9 3950X | RTX 4070 Ti | 32GB RAM | 10TB SSDs | 5K+4K HDR monitors
Canon Vixia GX10 (4K 60p) | HF G30 (HD 60p) | Yi Action+ 4K | 360Fly 4K 360°