Can't add an app to exclude.

Looking into this now, Ben. We'll come back to you shortly with an update.

The latest update (1.0.54, available now via Check for Updates) sorts this out in two ways:

1. Code editors and IDEs, including Eclipse, now default to on-demand correction, so Charm won't change your Java as you type. You can still use Fix Selection deliberately on a comment or commit message whenever you want.
2. You can now add any app to your per-app settings directly: in Charm's Settings, open the Apps section, click "Add App", and pick any running app, including ones installed outside your Applications folder (that's why Eclipse wasn't appearing before).

So Eclipse should be left alone automatically now, with full manual control if you ever need it. Give it a try once you've updated and let me know if you have any other questions.