sorry--once the downloads.dat and .bak for those files are gone, you have to start from scratch. You can preview the portions, but LW cannot currently figure out which bits are missing without using the dat and bak files.

you can save incomplete folders, but have to save the .dat and bak with them (you could have many incomplete folders, each with its own dat and bak files. Before starting LW, just place the inc folder you want in the primary location, and that's th one that will resume when starting LW).

However, there has been some talk about being able to recover incompletes through the "hash map," IIRC, but I guess this is still quite a technical challenge that's probably not worth the overall effort.

So, as others said earlier, just start from scratch: it's probably the easiest way. All that wasted bandwidth! sigh