Did you install Genesis Starter Essentials? The content is not included in the application installer.
I too have the same problem except I had to manually download and install 4.6, the DIM wouldn’t work with an error of “not a win32 program” Now I have searched the complete Hard Drive and cannot find the Genesis.dsf.
I did have it with 4.0 but now it’s gone…
Where could it be?
DS4.0 had the application and content in a single installer. DS4.6 has it split, the content is in Genesis Starter Essentials. The user-facing files are now .duf rather than .dsf, so if you go to Edit > Preferences > Startup and it’s listing Genesis.dsf as the startup scene, change it to Genesis.duf
It sounds like the download of the DIM installer is corrupted—clear your browser cache and try redownloading.