This automatic role selection dialog opens if you haven't set a default role for the project in Roles and if you have marked the Show role selection checkbox in General Settings.
If a role has been set, you can see it in the lower right corner of the status bar.
If you open the Checking layout and a dialog box opens prompting you to select a role, you need to select a role and rulesets to be used in checking:
To select a role and rulesets :
Select a role from the list. You can see more information about the role and the type of tasks that it can be used to perform the Description field (if the roles author has defined this).
If you regularly use the same role, you can choose to save it (once selected), mark the Save as Default Role box.
Default rulesets to be used in checking are suggested to you. Each role can have its own set of default (highlighted blue) and additional (not highlighted) rulesets. The default rulesets are suggestions, and you can de-select them by clicking on them. Additional rulesets can also be selected.
The Add Rulesets option is only available for Super Users.
Select the rulesets you wish to use.