If you've already downloaded the application, simply launch it and under the "OneWay" menu, choose "Check for Updates". You should be prompted to install 0.5.2 - Thanks!
another feature request: ZIP and upload. This is because I prefer to ZIP several images of an event and upload them afterwards. Thank you!
If one file is selected, make ZIP of this one file - then upload.
If multiple files are selected, ask for a name, make ZIP of files - then upload.
Yea, that would be a pretty good feature. I'm thinking a preference pane that allows to enable something like this would be easy. I'm also thinking of adding a "rsync to ..." option that you can enable as well.
Any plans to support SSH public key auth? It would be great if the app could use existing keys in ~/.ssh/
Yes. This is definitely in the works for the next release. Under the hood I am using libcurl which makes implementing public key auth pretty painless.