Close wl photo gallery,
Click on your start button on the taskbar and then click on the pictures listing,
Massive resetting of the hidden attributes can be done by right clicking the (my pictures) listing on the folder tree, and select properties, general tab section, check
the hidden box and click on apply, this will change all of the files to hidden, click yes, then uncheck the hidden box and apply, it will remove the hidden attribute from all of your files, click on yes, then save.
Reopen wl photo gallery.