Yeah, I'd seen something about the RTR Platnium team addressing this siege tower issue with their next release. It was over @ TWC in this topic:

Issues with siege towers since update

As you say econ, I think I'll hold-off visiting their forums since I don't have any recent backups of my own modding project, and wouldn't really want to lose my hard drive to a potential virus / worm / trojan. I've had my own bad experiences of this in the past, basically had to reinstall everything from scratch

It would be good to see how they rectified the problem though