AMPlifier causes reboot after install of BoingBag 3

[tingo]

I have an A4000 with Cysberstorm PPC & CyberVision 64 (not 3D).
It has AmigaOS 3.9 installed, and I just finished installing BoingBag 3 (having previously installed BoingBAg39-1 and BoingBag39-2).

But now, every time I try to launch AMPlifier (2.35) my machine reboots.
Any idea?
BTW, how do I get a previous version back? The BoingBag archives doesn't seem to have the files in them?

[tingo]

Ok, I figured out how to unpack / extract the contents of BoingBag3.9-2 (google to the rescue again), and replaced the AMPlifier folder in SYS:Utilities with that from BoingBag3.9-2. But AMPlifier still makes the machine reboot when I start it, so something else is wrong. :-/