No problem, just bookmark https://startupwp.com/user/uendi/ for future use and you can always track your account history there.
Slider. Yes, the plugin needs to be activated and setup for this to work. I would just uncheck the slider option in your theme options until you’ve had a chance to do so.
Contact Form. I assume you’re using?:
You need to copy and paste the contact form shortcode into your “Contact Us” page content under Pages. Of course make sure to actually setup the contact form in the plugin’s settings.
Upgrading. https://startupwp.com/topic/upgrading/ / https://startupwp.com/topic/installing-your-theme/ – If you upgrade to pro, all content and settings will seamlessly transfer to the pro theme. You’ll only have a problem if you’ve been editing files directly in the parent theme. One note though is that you’ll also have the pro slider plugin that you’ll need to setup: