Answer: In the Blocs main menu, select Window : Extension Manager. Select the old bric and then click the '-' in the top-right corner, which will remove the old version of the bric. Save & Quit Blocs. Open up the Extension Manager again & Click the '+' in the top-right corner & browse for the new version's .bex file on your computer. This will install the new version of the bric. Restart Blocs.