Click + and FIRE at the same time to enter the menu, then configure your settings as shown here
http://tubo.lamart.ch/manual.png.
If 2,3,4 clicks is doing nothing, navigate to menu>interface>clicks and check that the modes are properly assigned to each click.
For the record, the coil resistance of my TETRAx is 0.253 (your value should be written on the little paper tag on the TETRA's cable).
I only got the Tubo software installed on my eVic mini a few days ago and it's made this already fantastic vape even better. On demand mode is great because it's still temp controlled (I had thought it would just be like wattage mode), but Cruise+Eco mode is where things get really special.