How to change installed demo theme social links?

Hi,

I just purchased the theme and installed a demo theme namely “classy Magazine”. By default, the blog posts showing a sidebar with social links. Here is the screenshot for your easy understanding, http://prntscr.com/l00q0v

I need to change them but found no options. Neither in the Theme Panel nor in the widget section.

How can I update that?

Another problem I am facing that while I tried to edit a page with TD Composer, the browser shows completely blank. Here is another screenshot for your easy understanding, http://prntscr.com/l00qrz

I clean up cookies and tried 4 other different browsers, but all are same.

What could be the possible reason for this and how I can fix this problem?

Thanks in advance for your kind help.

Best

Hi, I just figured out the second problem (TD composer not working). I just found the solution in other thread.

I add below codes in my Htaccess file and now it perfectly working.

<IfModule mod_substitute.c>
SubstituteMaxLineLength 10M
</IfModule>

I really need to know the solution to the first problem.