They will remain at zero % until the files actually start redownloading at which time they will show their previous download percentage.

However, if you deleted your download preferences which now are found in the main LW preferences folder (previously in the incomplete folder), called downloads.date & downloads.bak, then LW will not be able to use those older incomplete files at all.

They do NOT show their previous download %. When they restart downloading, they stay at 0%.

I don't think I deleted my download preferences. I don't even know how to access that option. Where is that folder?