Hi Linda. I see you posted this support question in the Translations forum. I moved it to the Pre-Sales forum just as a place to put it since we do not provide support for non-paid users.
For this specific request, though, I’ll point you to one of our existing feature requests, for which you can vote: https://tribe.uservoice.com/forums/195723-feature-ideas/suggestions/3777092-subscribe-to-calendar-via-ical
If you made your purchase(s) through a different user account and have any other questions, please login to that account and then post in one of the paid forums.
Thank you for your understanding and thank you for using our plugins.