EMB135 Dispatcher is informed by the crew enroute of a pitch trim problem and the decision to divert due to weather. After the problem was corrected; the flight departed and landed at the original destination. On the next leg the pitch trim problem reappears and the crew elected to declare an emergency and continue to destination.

Narrative

While enroute; the Captain notified me of a Pitch Trim problem. When the flight arrived in the ZZZ vicinity; the Captain was not comfortable landing at ZZZ due to the destination wx and due to his maintenance issue. He proceeded to divert to ZZZ1 and I advised him that was not our best option due to the current wx conditions at and around ZZZ1 and that ZZZ6 would work better for us. After some convincing; the flight turned around and landed at ZZZ6. While on the ground; we discussed the maintenance issue with Maintenance Control. After the problem was corrected; the flight departed and landed at the original destination which was ZZZ. While enroute on the return leg; they developed the Pitch Trim problem again. The capt notified me he was declaring an emergency and was going to continue to ZZZ2. I suggested since it was an emergency that we divert to ZZZ3; ZZZ4; or ZZZ5 which were along the route. The capt replied that they were continuing to ZZZ2 as planned and that ZZZ2 had long runways and CFR.