Thanks for posting this! It's possible that you are stuck on a block that was invalid in 0.5.0 but is now valid in 0.5.1
Here is what I would suggest:
- upgrade to 0.5.1. (The download links on the website can take you here. Or you can go directly to Github Releases
- open Help->Debug Window
- Go to the Console tab.
- execute the following command.
- reconsiderblock 18dc863dbd74d07ad41a6b09e80cf314c8e5db23a80d0b0d46774486dad19178
You can then either close/re-open the app, or wait for about 10 minutes, and it should continue syncing.