If all you want to do is to enable playback of DVD+RW's on other players, there's another option - in place of updating.
As they came out of the Liteon LVW-5005, none of my DVD+RW's would play in stand alone players, including my Sony DVP-NS500V. They would give a "dirty disc" error! Then, I discovered this on another forum and found that it works for me.
With the LVW-5005, if you give the recording (Title 01) a "Name", it appears to work like "Finalizing" a DVD+R. Look at page 25 of the User's Manual for details on how to do a "Title Edit". It's a "no-brainer" once you've done it.
Once the DVD+RW has been given a title "Name", they play in my stand alones just like any other DVD movie.