Change big tab icons

Hi! I've some problems to change the icons of the GK5 Tabs. Can you tell me how to change them?
I've change the .png file in the correct order, removing the microphone with other icons created by me. I've proven every Content tabs and only 2 are working well. What I don't understand is that if in the .png file the microphone is deleted why is still appearing¿?

tabs.jpg

PD: I'm working in a local site so I can't pass you the page

Hi,
did you edit .png file located in templates/gk_appsprotech/images/style1/tabs_big_icons.png ? Maybe you are using cahce and you didn't clear it after change.

Hi,
did you edit .png file located in templates/gk_appsprotech/images/style1/tabs_big_icons.png ? Maybe you are using cahce and you didn't clear it after change.

I've solve the problem, the microphone was appearing cause of Chrome cache problem. I'd found that when you are editing the tab1 to 4 you can change the html code so there I've discovered how to change, thanks!

Hi,
did you edit .png file located in templates/gk_appsprotech/images/style1/tabs_big_icons.png ? Maybe you are using cahce and you didn't clear it after change.

Can you able to tell me how to change the title below this small images