Yes. The last months, some forum members and me have worked very hard to solve the 'connection lost' problem. But this also meant in ABMaterial, stuff had to be programmed differently by you, the programmer. Events have gone, others added (e.g. the whole page_ready event part is gone). Normally, in the next couple of weeks the new donator version 2.50 will be ready, and I will be able to release the free 2.20 version then also. So it depends on your patience
Anyway, it dees not hurt to play with 1.22, just don't start a new 'real' project with it.