The beta will send them to the trash ... & I have to admit I haven't tried out the new release LW 4.12.10 but it may also have that ability.

In your case though, you'll need a file recovery program. Unless you have something like Norton utilities, you can try some free ones. This one Restoration (click on link) seems to get good reviews from users. Another is PC Inspector File Recovery (click on link). But whatever you do, don't resave them onto the same partition. In fact, stop saving any files onto that partition until you have completed the recovery process. Otherwise you will greatly reduce your chances of file recovery.