To add photos to Arkiver from your Evernote account, you'll need to connect to Evernote.  

1) Click "Connect to Evernote" in the Moment Uploader screen

2) Sign In to Evernote

3) Click "Authorize" to allow Filepicker (the service Arkiver uses to connect to your online accounts) to access your Evernote files.

4) That's it! You'll be connected to Evernote and can pick photos to upload to your Arkiver. Hooray!