With the program open, press F1 (on a Windows pc) or open it from the Help menu.
It's a bit cryptic in places, but quite comprehensive if you stick with it.
Do note, the current version of Digital Camera Utility, v5.9.4, available here as an upgrade
Software Downloads : Support & Service | RICOH IMAGING , is far easier to use than the version on the CD.
Even though it "looks" very similar there are now "mouse-overs" for most items, so a lot less referencing of the help file is needed. There are also extra features added
These pages
???????RAW??????????Digital Camera Utility 5 ?1??????? | PENTAX official from the people who wrote the program can give further insights
Enjoy!