Madfinger games did a maintenance update on there website the other day and now DeadTrigger2 v003 trainer is no longer letting you enable any cheats from the menu. it only lets you attach either of the processes. tried on both firefox plugin container and chrome.
EDIT 1
downloaded fresh copy and it seems to be working again :-)
EDIT 2
now failing to enable cheats in menu in both firefox & chrome :-(
EDIT 3
Failed because the trainer select the wrong proccess id.
Use firefox
Login facebook and open Dead Trigger 2
Open task manager
There are two plugin-container process, kill the one with the smallest memory usage
Open the trainer, select plugin-container.exe and continue then enable all cheats one at a time