Help! I let Itunes on to my PC!

[Beegee10]

Hi

After years of stubbornly not being drawn into the new religion of "Apple", I stupidly downloaded Itunes and from probably not fully realizing what it was going to do I have destroyed my nicely organized media library. It has taken some songs from some albums and put into new folders, moved whole albums but doesn’t recognize the whole album on its own player!?!, and exploded every single compilation album into single artists……plus probably more things that I haven’t found out yet.
To top it all it doesn’t have an Undo or check button!
Is there a way in Winamp (that I have used for years, great fantastic Winamp) to reorganize my media library to put everything back together again?
Or should I unplug the computer lock the office door and walk away….