How to change island size

Hi,

I created a parking lot with islands using 'Openroads Designer - Site Layout - Parking Lot' . The island sizes are fixed to 2.5m automatically but I need them in 0.8m. how do I change the island width?

I already gave a minimum island width from element properties but nothing changed. 

software : OpenroadsDesigner connect Edittion 2020 Release 1