I am not able to proceed. JOSM starts analyzing an 80MB OSM file downloaded from http://downloads.cloudmade.com/americas/northern_america/united_states/washington#downloads_breadcrumbs but then the popup win closes not loading the data.
an 80MB OSM file can be already too big to get loaded in JOSM.
And have you seen at Cloudmade’s website that those data is two years old now???
If you want to load bigger areas into JOSM, try the “Mirrored Download” plugin there.
How much RAM do you have? You can assign more RAM to Java by using a command line option.
eg something like this:
java -Xmx1500M -jar josm-tested.jar
That would assign 1500MB to Java. You can set that to a larger number if you have plenty of RAM. That should help for opening larger files.