It's not abnormal for the files in the Saved Files to be red. What's important is the files in the Shared folder. These will always start off red as soon as you open LW. One by one as LW accounts for them, they'll turn black. So after opening LW, be patient & wait for them all to turn black. You'll know by watching the share counter at the bottom of the LW window which will show how many files you're sharing. When you open LW it may show 0/560 with 560 being the total. But after a while it will go to 23/560, then 134/560, etc. until it's accounted for all.

They may turn red otherwise if you've moved them or renamed them but LW hasn't updated its database. So you'd press the Refresh button in the LW Library window to re-account for changes.