Did the new User Interface of golem Overlord just increased confusion?

Golem overlord is one of those games, I have praised at so many times. Even today I praise the team behind for continue to doing something or the other with the game to make it look more entertaining and still attractive even after a year of launching the game. Few weeks back a new UI was launched and to those who have used the old one faced issues with various features about which I highlighted in a post as well, last week.

They came up with a new changes in the interface once again yesterday and now I thought they must have solved the problems and make it simpler for us once again but maybe that is not the case. At least for me it is not the case as I face more difficulty with the user interface now. For example when I went on buying the scavenger golems here is what happened with me, check in the screenshot below.

Earlier we use to see a option of using parts or comps for purchasing them or for any other upgrade as well we use to have options. You can see below that when I bought the golems my 10 parts were used.

For sure we can use COMP as well but I don't know how to do that. Maybe I will have to explore the entire UI once again to see that option as I can't use parts for golems and I prefer to use them on permanent upgrade which will increase my ranks permanently. With buying of golem rank increase and once they erode your rank becomes the same again.

If anyone knows how to use comp they can share with me in the comments about the same and I will be thankful to him.

Thank You