The Launch function in the LW Library is only intended for opening multimedia files such as video & audio files.
Advice is to stay away from files less than 2,000 KB (2 MB) because most smaller files are viruses or spam images. See
WARNING: Viruses on network you should be aware of! (click on link) So make sure you use your anti-virus program to check "all" downloads before attempting to open them!
For fast & easy access, go to your LW Library window, select Saved Files folder & press the Explore button. Sample image here:
Using Library Explore button to access downld folder (click on link) & the folder will open up for you. Then open the files from there.