Either way, when I try to rename a page name, usually you can click with your mouse to get the cursor where you want it in the text. You can't do that with BSS at all, if you click it with the mouse it quits the editing setup. You have to move the cursor with the arrow keys of your keyboard or delete the current text in order to edit it.
This seems like a bug to me as it definitely should allow you to click inside the text to edit it since every other program does and most of the other features of the app do as well.
Thank you for reporting this! This bug is the result of a change we made to the way multiple selections work. It's going to be fixed in our upcoming release (should be out very soon).