Can't switch from Classic to Modern interface

[GoogleCodeExporter]

Hi, I switched from the default modern interface appearance to the classic 
interface appearance to see how it looked (I went to options->Interface 
Appearance, made the selection and then restarted texmaker) but now that I'm 
attempting to switch back to the modern appearance via the same process (which 
includes restarting texmaker and even Kubuntu) it always starts with the 
classic interface appearance. 

I tried apt-get purge texmaker followed by a reinstall of texmaker but 
apparently there are still some configuration files that texmaker stores 
somewhere that survive the purge. 
How can I get back to the modern interface appearance and/or where are these 
configuration files that survive the purge stored so that I can delete them?

Thanks!

Original issue reported on code.google.com by mgkr...@gmail.com on 2 May 2015 at 7:00

[GoogleCodeExporter]

Update: I've found that this issue can be fixed by going to 
Options -> Settings File -> Reset Settings  
and then if you have saved your previous settings you can then restore them or 
else reconfigure everything. 

So this issue post is more of a bug report and information about how to fix 
this issue for anyone else who has encountered this problem. 

Original comment by mgkr...@gmail.com on 2 May 2015 at 7:09