Hello.
Unfortunately, Booking Calendar does not support importing/exporting of the ical/ics, yet. Sorry.

Also plugin does not support synchronize with Airbnb, Homeaway, or VRBO.
These features exist in out TODO list for future updates. But I can not say about the exact day of implementation of these features.

Booking Calendar support import of events from Google Calendar.
And paid versions of plugin support of export bookings to the CSV files.
Kind Regards.

Hello.
If you do not see the booked dates in calendar at the front-end, please open the General Booking Settings page and in the "Advanced section", please be sure that you have not activated this option: "Allow unlimited bookings per same day(s):". This option must be unchecked. If its checked, please uncheck it and update the settings.

If you still will have this issue, please recheck for the any cache plugins, like "WP Super Cache" or "W3 Total Cache". If you are using someone, please deactivate it or add the exception to the page with booking form for do not cache this page(s).

Also its possible situation, when 2 different visitors can open the pages with booking form at the same time, and at the same time select SAME date(s) and time and submit the booking. To prevent this workflow, please open the General Booking Settings page and in "Advanced section" set checked this option: "Checking to prevent double booking, during submitting booking".
Kind Regards.

Hello.
If you was asking about can you change the time-slots list in this version, so, yes, of course you can edit it at the Booking > Settings > Fields page.
Please use shortcode generator at the right side of the Booking > Settings > Fields page for the fast and correct creation of booking form fields.

Please note if you will make the booking for the specific timeslot, this timeslot become unavailable for the other visitors for that selected date in current specific calendar. You can use one"timerange" (timeslots) or "start time" and"end time" selections or"starttime" and "duration"of time selections shortcodes or even start time and end time entering shortcodes. Please read more about the booking form fields configuration here https://wpbookingcalendar.com/help/booking-form-fields/

You can test the bookings for the specific time-slots in action on the live demo of Business Small version (which is configured by default for the bookings of specific time-slots) here: https://bs.wpbookingcalendar.com/ Other live demo you will need to reconfigure.

P.S. If you was meaning something else, please explain it more detail in some example.
Kind Regards.

Hello.
1) Unfortunately, user who is making the booking must select each day in calendar, where he/she need to make the booking.
So user can select each Wednesday in calendar where he/she need to make the booking and then select the time-slot and submit the booking form.
In addition you need to activate this option "Use time selections as recurrent time slots" at the General Booking Settings page in Calendar section. This means that middle days will be partially booked by actual times, otherwise the time in the booking form will be used as check-in/check-out time for the first and last day of the reservation.

2) The "admin@blank.com" value in the email field is using in plugin for several checking about setting dates as booked and for example not sending emails for such type of booking.

In general you can make customization of plugin relative these auto-fill data at the file ../{Booking Calendar Folder}/inc/biz_s.php

inside of this code:

function autofill_bk_form(){ var my_element_value = 'admin'; var form_elements = jQuery('.booking_form_div input'); jQuery.each(form_elements, function(){ if ( (this.type !== 'button') && (this.type !== 'hidden') && (this.name.search('starttime') == -1 ) && (this.name.search('endtime') == -1 ) ) { //FixIn:6.0.1.12 this.value = my_element_value; if (this.name.search('email') != -1 ) { this.value = my_element_value + '@blank.com'; } if (this.name.search('starttime') != -1 ) { this.name = 'temp'; this.value=''; } // set name of time to someother name if (this.name.search('endtime') != -1 ) { this.name = 'temp2'; this.value=''; } // set name of time to someother name } }); //jQuery('.booking_form').submit(); //var form_elements_text = jQuery('.booking_form_div textarea'); //jQuery.each(form_elements_text, function(){ this.value = my_element_value; }); }

Kind Regards.

Hello.
You need to change currency at the PayPal payment system, because it's default system in plugin.
Kind regards.