Well I see SW Log is back, but just to put a wrapper on the R75 software question, here are the links I know of that are compatible and where you can find them...
Receiver Software Applications - The RadioReference Wiki
Callsign, Ergo, RxPlus (likely out of development - haven't heard anything about it in a long time), SysLabs RadioControl, tk75 (TCL/TK software from Bob Parnass - and I think this one is also out of development/support)
Amateur Radio Transceiver Control - The RadioReference Wiki
Bonito Radiocom, Commander, Control the Radio (Pocket PC app), TRX Manager. And there's even MacLogger DX for MAC users.
If there are other packages that work with multiple HF radios that include the R75 please chime in