I use hamster as a project time tracker (i would think alot of people do it), and also use the data to write invoices to customers and to report my work hours to my employer to get my salary.

Currently you are only able to export everything in a month, week, or day.
I would like to be able to customize the time frame and what activities to export.

The workflow could be like this:
Press "Generate Report" to open the report dialog
Select format (as part of another ticket)
Select start and end date
Select categories and/or activies
Select output file/directory
Press "Generate"