I had this "not recognized/failed" loging moving to 0.5.1 from 0.4.1.  I followed a post on the forum and I was able to install the 0.4.1 version and get access to my wallet.  Now, a few weeks later, again it's giving my issues.  I cannot restore I cannot install 0.4.1 and restore.  It asks for my words and when I give it I get the last message  "Wallet is Synchronizing. Please wait until complete" .  It does nothing after that! 
What other options do I have?  I've made backups of my wallet but I am losing faith in this app and the lack of forum discussion.  Is this a viable wallet solution or should I just move on?

Thanks,
Bitcoin not so great...