I have posted a question regarding plugins, but I am also having the same issues after buying 2 licenses for 2 users.
I am very disappointed to say the least. We use Alien Skin 7 and Nik.
It puzzles me that you have released a product that has such weaknesses with regard to PS Plugins.
The least that could have been done is to warn users that plugin support is "very patchy".
People will not wait for every though, and I have seen some stating they are returning the product.
But saying all this, I think the product deserves a chance, and so will keep the product, but will stay with Adobe CC for now.
I think the product is great beside this and I applaud anyone taking on the might of Adobe and kicking them on the shins good and hard.
Please hurry with the support!!!!