Walk cycles broken, Ch Anim Version 2.0

I’m experiencing an issue when opening older .puppet files (Version 1.5, Build 138 [Ch Anim 2018]), which contain rigged walk cycles, in Version 2.0, Build 257 [Ch Anim 2019]. The walk cycle is recognized in Version 1.5, but not in Version 2.0.  Is anyone else having this issue as well?  Any help would be greatly appreciated.  Thanks.