Why do I see the trial message?

You are trying to use features that are not in your Free license.

Professional features: Disable image compression

If you want to use this functionality, you can get a license for the Professional edition. You can also get a higher level and get access even more great features.

Professional edition

With the professional edition, you can also:

Buy the Professional

Expert edition

In addition to the professional features, you can also:

Buy the Expert