Image Slider not switching images; Theme won't update

I'm currently running Adventurous Pro: 3.6.2. I placed 3 images into the "Select Slider Type: Image Slider" with URLs but only the first image will show and the others will not switch. I've had this issue since upgrading to Pro version. Trying to figure it out now. So I decided to upgrade to the newest version of Pro 3.9.3 thinking maybe a bug was fixed. I followed the instructions, downloaded the file, uploaded via New Theme but it says 'install failed'. I'm hoping if I can load the newest version it will fix the slider issue but... any idea why I can't get it to install? I'm running WordPress 4.7.3