Items in red are those who are behind firewalls. It will be harder (but not impossible) to downld from those sources.
Yes Find sources does work! If you have a healthy connection it may work very well indeed. But nothing is more effective than manually searching for the topic itself to help find sources.
The issue with Find Sources/Resume is if it's applied to too many files it will result in side-FX!!! Your files will be queued for much much longer. LW's connection quality may drop. LW & perhaps even your comp will use up all their resources & thus everything slows down. Loss of effective quality use.
Some hints:
A well set-up LW can start to automatically continue its dwnlding after it's settled down perhaps 2 out of 3 times you open LW. Optimising LW & Maximising Uplds & Dwnlds A (1st post only) & also Part B which is even better & last & least are search & dwnld hints. The latter one I've been thinking about re-writing for some time. That's just for playing it safe. eg- I show all speeds & qualities.