6.33 is 'not' for DS708. Revert to 6.31 as latest for that unit.
Logon to pro.auteltech.com,
place sd card in card reader attached to pc,
install 6.31 on SD Card,
reinstall SD Card in DS708.
Now it will work.
Summary: The 6.33 program was (mistakenly recommended) by the hardware/software when updating, notifying as a "Need to Install". The 6.33 update is for an entirely different hardware unit, yet among the list of possible MaxiDas updates and also the most recent.
Does that help?
Edit: If necessary, afterward, proceed to update software for desired makes.