In all Mach3 screens you must type the <enter> key to complete any DRO input. If you simply enter values and then click another DRO the value will return to its original number.
There are many wizards in the Mach3 install kit. Only the Newfangled Suite are supported, the rest are user contributed and unsupported.
The unsupported wizards should run in the demo mode, they have no license code in them. The Newfangled suite will run and show you the code, but will not save the gcode when you return to mach3
I do not know anything about how this forum is managed, or what systems it runs on- I use Firefox without trouble.