I broke the install button on my web store page in version 3.0.1 with supporting 6 languages.
After finding issues with language support I have rolled back the 6 localized languages for the time being until the store goes international. I believe this fixed the aw snap install error. So please try installing Chrome Editor again from the web store.
I’ve sorry I cannot currently support international languages until google rolls out the international version of the web store later this year.
I try to be on the cutting edge with my Google Web Store apps so that I can gain better credibility and developer points.
Apparently their are not really any web store apps in localized builds so I think mine was the first. The only problem with being the first is that my app was not working. I did write a post on the Chromium Apps group on google looking for an answer.
So try out Chrome Editor 3.0.2 today and in the future Chrome Editor will support localized builds.