I've wondered the same thing about the Resume function in the library. At least if they're files that are very important to you, you can at least get them even if it means starting from scratch.

Your problem is most likely as a result of your comp crashing or you not closing LW down properly before shutting down your comp. These 2 things can corrupt the downld preferences. Try searching the topic of each file before using the Resume button in the library. This might give a better chance of success.