Upgrading from Hikashop Starter 4.4.2 to the lastest version of Essential

-- HikaShop version -- : 4.4.2
-- Joomla version -- : 3.9.26
-- PHP version -- : 5.6.40

Hello,

It's looking like I need to upgrade From Starter 4.4.2 to the latest version of Essential because I need the cron feature stated here - www.hikashop.com/forum/17-serial-how-to/...er-stops-paying.html

Will upgrading from Start 4.4.2 to the latest version of Essential have any side effects? Do I just install the essential download file and it upgrades everything on its own?

Also for the cron to work, do I need to attach the websites subscription to Hika Subscription or Hikashop Essential? In here - www.hikashop.com/component/updateme/subscription.html?Itemid=99

Thanks,
Josh

Thanks Nicolas.

One last question. Does the Essential subscription need to be valid (non-expired) for the cron to work?

I'm using this feature to manage Hikaserial subscriptions so I am a bit confused about how this works

Thanks

Another question I have:

I'm currently using a temporary URL. Is it possible to put that in here - www.hikashop.com/my-account/your-subscriptions.html for testing purposes then delete it and replace it with my final live URL?

Thanks,
Josh.

UPDATE: Tested this. I can!

Thank you!