If your browser is not set to open pages opens in new tab, we strongly recommend changing the settings. It is much tidier than creating lots of new windows. Here's how:
For Internet Explorer 8, click the Tools pull-down menu, then select Internet Options, then under Tabs click the Settings button, then under "When a pop-up is encountered" select "Always open pop-ups in a new tab". Finally, save your changes and exit.
For Firefox click the Edit pull-down menu, select Preferences, then Tabs, then checkmark the "Force links that open new windows to open in" line, and finally, select the "a new tab" option. Finally, save your changes and exit.
If OpenUpper is not opening all your web pages, you may have a pop-up blocker enabled or your browser limits the number of items that can be opened. Try holding down the Ctrl key (Command key for Mac) when you press the open checked button. Still having problems? Try the instructions at our sister site, here.