My Songs Are Missing From My Library!

[nzgirl]

After having a message saying 'A new version of Limewire is available' come up on my screen everytime I opened up Limewire I decided to download the "new version". I was previously using Limewire 4.14 but downloaded Limewire 4.18. Once this was downloaded I realised I couldn't find my songs in the library file and so uninstalled 4.18 and installed 4.14 again. Still my songs are missing from my library!! I am using Windows Vista and have Trend Micro PC-cillin Internet Security PRO 2009 Upgrade. I am also on Broadband. I'm hoping I can find all my previously downloaded songs. HELP!!