Though the release of 0.75 seems to have gone reasonably well, some issues have come up that we're working on addressing. These include the Entmoot bug and a few balance changes. Expect a patch to be out in a week or so, as we're also working on making needed improvements to the AI that need some more time. We'll also be releasing a Worldbuilder installer that will allow you to make maps with TDH content effortlessly. Stay tuned for more information.
In the meantime, we can offer a solution to the pink arrows bug that seems to occur at random. To greatly decrease the chance of this happening, when you install The Dwarf Holds, makes sure to run the installer as an administrator. To do this, simply right click on the file and select "Run as administrator". Then, proceed as normal. This has worked so far for forum members. If the problem persists, you may also want to run Battle for Middle-earth as an administrator.
Thanks for your patience!