Yes, if you read the patch readme, 1.07 has some bugs fixed in comparison to 1.0 (towed array bug fixed in 1.02, broadband tracker not assigning correctly etc...).
There is a good 688HK FAQ here that should help you for the game mechanism and for the missions :
http://db.gamefaqs.com/computer/dosw...r_killer_a.txt
Even today 688 remains a very good subsim.