Complete manual App removal

Go to Online Store → Actions → Edit Code
In forder "Layout" find file "theme.liquid" and delete the following code: 

<!--SCS-->
<!-- This code is generate by Simple Coming Soon app. Please do not change it manually, it can cause to а cycle redirect. -->
{% unless content_for_header contains 'previewBarInjector' or content_for_header contains 'adminBarInjector' %}<script>
	document.write(
		"<script src=\"https://comingsoon.kad.systems/scripts/c445683fb1748982666c2324bdfe60f9.js?" + Math.random() + "\"><\/script>"
	);
</script>{% endunless %}
<!--eSCS-->

You need to remove all the lines before 

<!doctype html>

In case of any issues please contact Customer Support support@kad.systems