1. For incompletes, see Downlds refuse to reload (click on link), however with LW 4.12 it will continue from where they were if you do what's suggested in the link.

2. For files you're sharing or were sharing & are now in red, select them (can select multiple files whilst holding down the SHIFT key) & right-click on them & choose share files. Else, right-click shared folder & choose share folder.