cannot find .info file

I downloaded and installed the bootstrap 7.x-3.4 and tried to create a subtheme. However, by all ways I can find I cannot make it: 1) in some tutorials suggest that you can copy all the files from "bootstrap_subtheme" to the "my_subtheme" folder, but I cannot find the "bootstrap_bustheme" folder, as shown in the fig.1, the only folder related is starterkits; 2) I copy all files from the starterkits/cdn, then it can only have files as shown in fig.2. I cannot find any .info file, nor bootstrap_subtheme.info.starterkit, so my_subtheme cannot show under appearance at all. If I copy the .info file from bootstrap.info and rename it, yes, my_subtheme can show in appearance, but only general settings, no boot strap settings shown up, as in fig.3. I know there is also a theme-settings.php under bootstrap folder, but when I copy and put it under "my_subtheme" folder, it shows fetal error... I am using D7.32. I am a newbie but really interested in bootstrap. Can anybody help??