FIXED: It turns out that the problem was caused by having PT3 open at the same time as PT4. Once I closed PT3, the purging worked (although WAY slower than purgers were in PT3, about ten times slower...)
When I try to purge some Ongame tournaments that were autodetected PT4 thinks for a while and then says "purge successful" but the tournaments remain. It doesn't matter if I try to purge one tournament or several.
-Carlos
