This version is based on the new WebExtensions system for developing browser add-ons.
This change has implied a lot of code changes. Most of them don't affect the usability but some of them do.
One obvious change is, now there is only the Activation Button in the Browser Toolbar. The Settings Button has gone.
To open the Options Page, you can use the conventional way through the Add-ons Manager or the Options Button from the Input Dialog.
This version cannot use the Parameter Data from earlier versions of Query Bench.
For the case you want to transfer your old Search Parameters to the new Query Bench, there is a Module - Data transfer v1 to v2.
The earlier Add-on had the Help Page included. The current WebExtension now loads it from an external Site.
Besides of porting to the new system, some errors have been corrected and some enhancements have been made (e.g. better segmentation in the Sentence Mode).
Because of the many code changes, it's quite probable that new issues have been introduced in which case I would like to apologize.
Please don't hesitate to report any error you detect and improvement suggestions.