Need or not to update Pizogrophy software

Getting ready to restart printing. i notice that Pizogrophy Community version I have installed on my Epson 1800 is v1.8, not sure about print tool version but its same vintage as Piezography software. Do you recommend updating and if so do i trash older version or update over old? And will I need to redowndoad curves?
Also I’m wantiing to try Special Edition ink set. May I use the K6 60ml set, leaving the existing flush cartridge in slot 8?

When you install it updates. No need to trash anything before install.