Responsive Custom CSS Bug

I am trying out Template Creator 4.0.9 and found what appears to be a bug with the Responsive Custom CSS.
I added some code as following:
#ID1536293940528 .titleck {
color: red;
}
into the Tablet format PATSAGE Custom CSS box, then click the Close button, then SAVE (blue button) then Actions > Copy / Apply changes. Then viewed the front-end at the Tablet view size and the css wasn't applied. I checked back in the template and that css code wasn't there any longer so it appears it didn't save.

Hi
I have just tested exactly as you, with the same css code,the same steps. It is saved by my side
are you sure that you have clicked on the save&close button of the left panel before saving the template ? this is necessary

Please try again and tell me
CEd

You are correct. I was actually clicking on the < Close button I should have been clicking on the Tick symbol. Once I did that it worked fine, thanks!

great !
I know that this must be improved ...

I currently use Themler to create my Templates with, but I started using Page Builder CK for content. So I thought I would try using Template Creator to see how it compares to Themler. Themler is very extensive but can be frustrating as times. Page Builder so far is a lot simpler and I think the out put code will be cleaner. I can see that you are adding features so it looks really promising! I really like this Responsive Custom CSS feature even as it is right now. The one thing that I think Themler has over Template Creator is you can see what your changes look like in the editor itself without having to save and export all the time.

thank you for your feedback. I'm opened to the suggestions, and I note the point concerning the real preview