There is a solution, but, even then, you are going to encounter more errors down the line anyway, if you don't start a New Game+ (starting over but optionally keeping stats, money, and most items).
Consider if you wouldn't rather just make a new character before continuing to read.
So, to fix this first error so you can at least load in:
-- Make sure the game is not running.
-- Find any image file with ".png" extension.
-- Create a copy and rename the copy to "p-zbrow1"
-- Move this dummy file to [game directory]\Lust Doll Plus [newest version details]\www\img\faces
-- Search through the old versions folders for "p-zbrow1.rpgmvp" and move that over too.
Assuming everything is in the right place, your old save should now load into the new version.