Stange that Vaniila would work fine and not DD.
There is a FAQ by jpd in the Victoria Support forum, everything applies equally to DD.
maybe worth a look.
There is a slow down that appears to effect a small number of members with high end systems, I have not been able to pinpoint the hardware/Driver problem that causes it. But this was with HOI2 as well, so that is why I find it strange only your DD is affected.
There is a FAQ by jpd in the Victoria Support forum, everything applies equally to DD.
maybe worth a look.
There is a slow down that appears to effect a small number of members with high end systems, I have not been able to pinpoint the hardware/Driver problem that causes it. But this was with HOI2 as well, so that is why I find it strange only your DD is affected.