The default settings for the demo files has rules similar to the Street Fighter format: Bar starts empty, hitting/wiffing moves recharge the bar, special moves burns the bar.
The training mode is set to start with a full bar and always recharge after a certain amount of time.

Most of the settings you are experiencing are just part of the template files, and you can change them all at will.
Try looking into these settings and see what better fits your game:
Global Editor -> Training Mode
Character Editor -> Max Gauge
Move Editor -> Gauge Options