Web Update Duet Modules problem

I just installed VA 1.3, and ran the Web Update for Duet Modules a few times, and it seemed to work fine, but now it is always showing me the same 4 files to downlaod an update, and even after downloading them multiple times they still show up as new or updated in the list.
The devices are:
Updated AMX Thermostat AMXViewStat_Comm_dr1_0_0.jar
New AMX Camera AMX_PTE300_Comm_dr2_2_0.jar
New AMX Lighting AMX_Radia_Comm_dr1_0_0.jar
New Panasonic Projector Panasonic_GenericProjector_Comm_dr1_0_0.jar

Rebuilding the Device Database didn't helped. Anyone having an idea why these 4 Devices always show up again in the update and how to fix this?

Thanks,

TOR