New to Razuna testing it out and have a few quetions

You can convert images within Razuna on the fly. Go to the renditions tab and see the available options.

You can also preset the conversion by using “Renditions templates”. These can be found in the Administration.

You can automate this step with using the Workflow plugin.

The desktop client is old and not supported. Where did you download it?

To search go to the advanced search. You can also search with advanced options in all the metadata. Check out the search syntax in the guides here.