Hello.
Sorry, I am not sure that clearly understood your question.

If you was asking about how to configure the booking resources with specific capacity, then you can check it at this instruction: https://wpbookingcalendar.com/help/booking-resource/

If you was asking about the ability to select the booking resource (form) and then make the booking like in this example: https://bm.wpbookingcalendar.com/select-resource/ , then you can check the booking shortcode for that at this instruction: https://wpbookingcalendar.com/help/booking-calendar-shortcodes/

Hello.
1) If you just need to remove the "Standard" booking form" from the selectbox at the "Add booking" page in admin panel, then please make this fix:
Please open this file ../{Booking Calendar Folder}/inc/biz_m.php
then find this code:
if ($booking_forms_extended !== false) { if ( is_serialized( $booking_forms_extended ) ) $booking_forms_extended = unserialize($booking_forms_extended); ?> <div style="float:left;margin:0px 10px;"> <fieldset> <label for="booking_form_type"><?php _e('Booking Form', 'wpdev-booking'); ?>:</label> <select id="booking_form_type" name="booking_form_type" style="width:200px;" onchange="javascript: location.href='<?php echo $link_base; ?>' + this.value;" > <option value="standard"><?php _e('Standard','wpdev-booking'); ?></option> <?php foreach ($booking_forms_extended as $value) { ?> <option value="<?php echo $value['name']; ?>" <?php if ((isset($_GET['booking_form'])) && ($_GET['booking_form'] == $value['name']) ) { echo ' selected="SELECTED" '; } ?> ><?php echo $value['name']; ?></option> <?php } ?> </select> </fieldset> </div> <?php }
and replace it to this code:
if ($booking_forms_extended !== false) { if ( is_serialized( $booking_forms_extended ) ) $booking_forms_extended = unserialize($booking_forms_extended); ?> <div style="float:left;margin:0px 10px;"> <fieldset> <label for="booking_form_type"><?php _e('Booking Form', 'wpdev-booking'); ?>:</label> <select id="booking_form_type" name="booking_form_type" style="width:200px;" onchange="javascript: location.href='<?php echo $link_base; ?>' + this.value;" > <!--option value="standard"><?php _e('Standard','wpdev-booking'); ?></option--> <?php foreach ($booking_forms_extended as $value) { ?> <option value="<?php echo $value['name']; ?>" <?php if ((isset($_GET['booking_form'])) && ($_GET['booking_form'] == $value['name']) ) { echo ' selected="SELECTED" '; } ?> ><?php echo $value['name']; ?></option> <?php } ?> </select> </fieldset> </div> <?php if (!isset($_GET['booking_form'])) $_GET['booking_form'] = $value['name']; }

2) You need to remove all bookings firstly.
Then by using the phpMyAdmin or some DB editing tool, you need to execure the sql like this:
alter table wp_booking auto_increment = 1;, where "wp_booking" - its name of the table with bookings. this name can be different, if you are using the different prefix for tables.

3) By default its does not support. You can try to make it by yourself at the ../{Booking Calendar Folder}/css/admin.css file.
4) Unfortunately, its does not possible to make the multiple bookings on the same timeslot at the same date at the same calendar.
In the Booking Calendar Business Large version, where is possible to make several reservations per specific FULL date(s) by visitors (not time slots). At this version is possible to set capacity of the booking resource, so date(s) in calendar will be available until number of reservations is less then capacity of the booking resource.But in this version is possible to make reservation only for FULL date, not a time slots (time slots in this version only record data in the DB, but do not play any logic in reservation). Please read more info about the booking resources and how to configure them here https://wpbookingcalendar.com/help/booking-resource/

You can test Booking Calendar live demos at this page https://wpbookingcalendar.com/demo/ to be sure in functionality and do not have misunderstanding.

Kind Regards.

Hello.
the "Save Changes" button must be at the bottom right side of Settings page.
If you do not see it, then probably some error occur at the page and the settings page was not fully loaded.

Its can be because of conflict with some other plugin it actual theme.
Please try to deactivate one by one all other active plugins and then retest it. If its not help, please try to deactivate the actual theme and activet the default wordpress theme and then retest. Just need to find the reason of this conflict issue.

Kind Regards.

Hello.
Please try to make this fix.
Please open this file ../{Booking Calendar Folder}/inc/js/biz_m.js

then find this code:

function getDayPrice4Show(bk_type, tooltip_time, td_class){ if (is_show_cost_in_tooltips) { if(typeof( prices_per_day[bk_type] ) !== 'undefined') if(typeof( prices_per_day[bk_type][td_class] ) !== 'undefined') { if (tooltip_time!== '') tooltip_time = tooltip_time + '<br/>'; return tooltip_time + cost_curency + prices_per_day[bk_type][td_class] ; } } return tooltip_time ; }

and replace it to this code:

function getDayPrice4Show(bk_type, tooltip_time, td_class){ if (is_show_cost_in_tooltips) { if(typeof( prices_per_day[bk_type] ) !== 'undefined') if(typeof( prices_per_day[bk_type][td_class] ) !== 'undefined') { if (tooltip_time!== '') tooltip_time = tooltip_time + '<br/>'; return '£' + prices_per_day[bk_type][td_class] ; } } return tooltip_time ; }