is not a original theme by ips focus, i don't know where you found it !look yoru code :
manual code overwrite the original code who are responsive ....
is not only security patch is also bug fix, new code for compatibility with new php version and so the community is more fast more stable and more is good for all and same for you seo
is possible but you look all the modification you make for this if you disable all application for use just ecommerce what the point to installed a IPS suite ^^
if we talk a real e-commerce solution you can forgot IPS ... the commerce application is just a bonus in the cms but is far away to have all option need for a ggod commerce solution and after that after that depends on your abilities and your needs but overall the 3 best solution are :
woo commerce : bad for multilanguage solution
magento : bad for people who don't know coding and plugin are expensive
prestashop : plugin are expensive
And for beginner with no skills in coding the best solution is prestashop who are free with a template who use elementor (50 dollars) with this you have a real ecommerce and elementor send you the same facility like wordpress for create your page
ips don't need robotos.txt, he use meta balise for this so if you would make some change look the parameter of the meta balise
exemple : <meta name="robots" content="noindex, nofollow" /> for a board who need to be no scrawl by bot
the directory path is not correct never your address stop by datastore is impossible the folder is : uploads so try to replace in the address "datastore" by "uploads"