RV software V3.5 installation file is available here : http://electricstuff.co.uk/forumfiles/versatronics_Version%203.5.zip
Note that you need the calibration data for your specific machine (rv\DAT\rvdata.dat), otherwise a complete recalibration is required.
There is an updated version of the rvplace dll in the .ziip, however it appears that the machine calibration file is specific to the dll version, so you probably need to use whiever version of place.dll your machine was calibrated with.