You could probably do elbandi's solution just using a text file if you don't want do code it (and it probably would be faster):
1. dump the address list/dump the wallet
2. Copy the results and open in a text file.
3. Insert dumpprivkey in front of each line using your text editors commands to do it for every line.  In Unix it is pretty easy and in many other editors too.
4. Copy and paste results into the console, and I would think it would execute each line - I haven't tried and am not in front of it to try it.
5. Copy the results of the dumpprivkey list.
6. Edit as needed to reimport into a new wallet.

Then you would not have to do each one individually.  If pasting into console doesn't work, you could always try sending each via RPC automatically with a script.

I do not believe that the password is stored in memory after the wallet is unlocked.  I thought I read this during the heartbleed bug discussion, but have not verified it.


You want to do it while you still can.  ;-)