Everytime I setup eclipse in Windows I end up wasting about 30 minutes configuring the build path to get rid of all errors, here’s a self-reference post that you can also use to configure your Eclipse and get it ready to hack and patch FrostWire.
Source Tab
Add frostwire/core folder
Exclude: examples/**
Native library location: frostwire/lib/native/windows
Add frostwire/gui folder
Exclude: com/limegroup/gnutella/gui/Mac*.java; macosx; plugins; windows;
Native library location: frostwire/lib/native/windows
Add frostwire/gui/windows folder (nested, yes)
Libraries Tab
Add all jars in lib/jars, frostwire/dist, frostwire/components/all/dist
Order and Export Tab
Elements should be ordered as follows:
1. frostwire/core folder
2. frostwire/gui folder
3. frostwire/gui/windows folder
4. JRE System
5. lw-all.jar
6. FrostWire.jar
… Rest of jars.
Official FrostWire Blog 
Please forward this information as I am not sure if this is the correct place if any, during the down load proccess select components to install
frostwire application required is not highligted. I can’t get to highlight. please help