Sharp VN-EZ1U Owner's Manual page 22

Clearing the cache
Use this procedure to delete the current cache file and create a new
cache file corresponding to the current content of the folders.
Select "Clear Cache" from the "View" menu.
This deletes the current cache file.
"Cache"
When a folder is first selected in the PixLab Media Browser, the folder
is scanned and the file data and thumbnail images are stored in a file
called the "Cache". Creating this cache increases the speed with which
the thumbnails in the folder are displayed.
Clear the cache in the following case:
When the thumbnails differ from the actual images
(For example when a thumbnail could not previously be created
because you did not have the CODEC for a certain movie, but that
CODEC has been added by installing another application and the
thumbnail can now be created.)
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