You need to use the correct version for your MB. Different versions for z390, z490, z590, z690 etc. Here is the latest version I know of for z690 https://www.dropbox.com/s/94n1gmfftjjkl9b/MemTweakIt_20220317.zip?dl=0
Also memtweakit is broken on older platforms(I think z390/z490?) as far as...