I too am having the problem of the Evernote webclipper webpage automagically opening everytime I fire up Safari after having cleared its history/cache, which I do daily. Most annoying and I am hoping there is a fix other than having to disable webclipper. This began happening only after updating the OS and Safari. I am running Evernote 5.6.2 with Webclipper 6.2.4 on a MacBook Pro with Yosemite 10.10 and Safari 8.0. Thanks for any help the community can provide.