Hello @thaotran-1
Yes, there will be no problem when using the premium.
Just generate the product feed with the new version and you are good to go.
The premium version is a completely other plugin, so I would advise you to create a backup of the feed settings. The backup can be created on the setting pages of the plugin.
You can update the plugin with the following steps:
Step 1: Create a new backup of your feeds from within the settings page of our plugin.
Step 2: Download the latest update from your account / link in confirmation email.
Step 3: Upload the product by doing the typical installation in the WordPress Dashboard.
Step 4: During the upload process, if a notification appears and offers you two options, please select “Replace current with uploaded” to finalize the update.
Step 5: Press Ctrl + F5 to clear your browser cache.
Manually updating the plugin this way will ensure that you do not lose the product feeds you have created earlier.