The evaluation version of AQT will display a maximum column size of 200 bytes.
Once you have purchased a license you can reset this option in the options menu: Options > Display Options > Display Limits > Max Col Size. We generally suggest not choosing "No limit" (except when you really need to) as your PC may run out of memory if you try to display large columns.
You will probably also want to reset Max Rows displayed to 10000 at the same time.