Turn the mod off (5 clicks). Hold the fire and up buttons together until it pops up a menu. The menu will say "M1" and a 4 digit counter. Use the fire button to switch from M1 to the counter (or the up/dn buttons to go to M2 or M3). Once the counter is highlighted, use the up/dn buttons to set the TCR of the wire you intend to use in that memory mode. The setting is 100,000 (10^5) x the actual TCR. For SS316, the actual TCR is .00092, so you would enter 92.
Here is a link to the Wismec launcher for the upgrade (the app that does the upgrade). On the same page lower down, at the blurb about being able to enter the TCR, is a link to a .zip file with the instructions, most of which I have just told you, and the actual TCR for various types of wire.
Here is an ECF link to the TCR data as well. Once you have entered the TCR data in the memory cell, use the "3 clicks on the fire button" to bring up the menu to select the memory cell you have entered as the vape mode. As to why... well, I like it, and I think I am getting better TC response. You make the call. If you don't like it, 3 clicks, back to the menu, and select TCSS again.