To install SLpct go to Postinstall in the office category and first install the program installer called SLpct.
Then find the installSLpct installer launcher in the menu and run it with one click, enter the root password when asked and select Java JRE 8 as the default Java version and then a program launcher will be created on your desktop.
The SLpct package may need dependencies marked cie-middleware and openjdk-8-jre or openlogic-openjdk-8-jre which is completely normal.
Many thanks to Dario Dieci of Alternativa Linux for acting as a tester for this application.