This is the demo version of the Savage040-060 version 2.41.
Its limitations:

You  can  use  the  normal  (non vblank driver) in 4/8/15 bit mode and in the
resolution 512x384 only.  (no time limit)

The VBLANK driver works only in 8bit mode and resolution 640x480.
(no time limit)
Optimal driver for games: developed especially for Warcraft and Doom clones
Try it!

For  the 4 bit mode you need OCS/ECS chipset (or AGA of course), for the 8/15
bit modes you need AGA chipset.  (15bit converted to ham8)

What is in the full version?
No resolution limit (up to 1024x1024) in all (4/8/15bit) mode and in the
VBLANK mode too!
Special (much faster) 2x2 driver for full screen games

For more info please read the AmigaGuide docs!