ArcSoft Powermobia Message website lists the following feature:
Thread message mode (optional feature), list, create, send and receive all SMS and MMS in one conversation for each contact
So maybe threading in Arcsoft Powermobia Message 5.5.11.34 is possible? Just a matter of finding out what the right setting / registry key is and setting it?
I've made a post on the
Arcsoft General forum... we'll see if there's any response.