07-25-2012 11:04 AM
I suggest this thread:
It starts with a process for cleanly starting over, and there is some discussion, and there is also a post (15) with links to older Desktop Software versions, if those are needed. The additional items in step 2, as risky as some are, are often needed to clear out any corruption that might be causal. Note that this is not, by any means, guaranteed to work...but it has worked for many to resolve issues they are having.