Hmmm.... I think I never got the adf of the Putty Squad demo working with any version of WinUAE. But I do remember I got the WHDload-version of this demo working on a version of WinUAE. But I can't remember which version
I haven't tried it with the newest version yet.
btw, John Twiddy promised me he would dig up the source files of the game once he got the time. Seems like he doesn't have time, because it's been some months since he promised me that. But I still have some hopes left he will dig them up eventually.