Just get a HxC version of your choice and use the current version of the Software, which is HxCFloppyEmulator 2.0.22.0. It will work just fine. You can directly convert the .fzf files to the .hfe files used by HxC. Same for .img files you may find around, i.e. on Casiocollectors over here.
Omniflop requires a diskdrive which is compatible and a set of those old school disks. Not worth the hazzle.