Are the files still within the incomplete folder? My mistake about the partial folder. I was confusing with another program.
Re-select the same download location as you had before. That 'might' refresh them.

Sighs, LW 5 still has a lot of limitations. Cannot manually resume old downloads if they do not load with the program.

Perhaps it was a poor piece of advice to try LW 5.2 ... if anything I could have suggested downgrading to LW 4.