Upgrade 1.6
Go to https://bintray.com/balaswecha/balaswecha-dev since your isue name is upgrade 1.6 . You need to install page 6 deb packages . Package Names : circuit-construction-kit-dc-virtual-lab, circumference-and-area-of-circle, collision-lab, color-vision, concentration, conductivity, construction-of-qudrilateral, construction-of-triangle.