Importing .acnfg

I am trying to import a .acnfg files (tc9_vs2012black.acnfg and OgreDarkScheme.acnfg) from the link below following the directions in the post but nothing changes in my interface.  I am on the latest release of Test Complete: 15.30.355.7

https://community.smartbear.com/t5/TestComplete-Questions/The-Best-TestComplete-s-UI-Scheme/td-p/76599

 

1. How to apply the scheme you like:
   
   It is as simple as the previous steps:

2. 1. Download the *.acnfg file corresponding to the scheme you like.

3. 2. Click TestComplete’s Tools | Settings | Import Settings and specify the file you’ve downloaded.

 

Advice?

 

Thanks!

 

TanyaYatskovska