'If' you were going to use the new LW version, you would need to delete your previous LW preferences folder. This might be why you were having problems with it. Just in case make a back up of preferences folder if you wish to try again. And btw, in the new LW version, the download.dat preferences are stored in the preferences folder now, not the incomplete folder. Also for windows, the saved & Shared folders are actually implemented on the computer so a new download location is initiated compared to before. (oh .. forgot to mention, you should probably make a backup of your downloads.dat & .bak files in your incomplete folder 'if' you do update experimentally, just in case. I back up LW preferences folder & download preferences when using a beta or alpha, etc.)

lol no I am no expert. Just like to help 'if' I can at all.