I cannot get Lightroom to open, it gets to the first part then says, "Lightroom encountered and error when reading from its preview cache and needs to quit." Then "Lightroom will attempt to fix this problem the next time it launches". It doesn't fix anyth

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Using Explorer/Finder, locate your Lightroom catalog folder....inside that you will find a file called "yourcatalogname Previews.LRDATA", delete it (taking very great care that you do NOT delete the file ending in LRCAT) and restart Lightroom.
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