This is where the cleaner is now stuck.

That means it detected that your adata.grf's md5sum is incorrect and it's downloading a new one, that file is 33MB, so on a medium/slow connection it can take a while to download. It's not frozen, and if you don't let it finish, your adata.grf will be corupted and the whole client will not work.
The guild emblems are stored in the RO folder inside a
folder called _tmpEmblem. As AxeGunner suggested, if you currently have a folder or file called _tmpEmblem delete it, and then run the game. If the emblems still do not work go back to your RO folder and create a new
folder called _tmpEmblem and run the game again.
Edit: There have been many suggestions on ways to make the AnthemCleaner a little more transparent as to what it's doing. In the next version there will be a percentage downloaded displayed and also if the cleaner is quit in the middle of a download the previous version of the file will be restored.