Hi,
We didn't installed the previous version of the dynamic calendar in our demo website but we will install the new version in the same time than the release.
The new version is already finished but it requires HikaShop 2.2.2 to work properly. We added new integration features which allow us to create this new dynamic calendar (which will be called "date picker").
The idea of the current version of the dynamic calendar is to add a new option for the date custom field.
You can ask for "future dates", "past dates" and with the dynamic calendar plugin : "dynamic exclusions".
You can have only one exclusion configuration in the current version. In the new version you won't be limited, the specific configuration will be stored in each date picker custom field.
We want to release HikaShop 2.2.2 before the end of the month. I think during the week end.
The current version makes an extends of the "date" custom field in HikaShop.
The next version will create a new "date picker" custom field.
But to attach a custom field to a product (I think you are talking about an "item", a product added in the cart), it requires HikaShop Business.
"Order" and "Item" custom fields are in HikaShop Business, when the "user" and "product" are in HikaShop essential (and Business too, for sure).
Regards,