Where I can change text for front end or back end elements ?
All text strings can be changed through language files, path for front end: /language/en-GB/en-GB.com_universal_booking.ini
Back end path is: /administrator/language/en-GB/en-GB.com_universal_booking.ini
Where can I find email template and invoice variables?
In order to see all variables used for email and invoice templates, you should install Email message setup helper file, which can be found in download section.
Variable list will appear in your calendar menu item, email messages tab.
Once installed, don’t forget to turn on plugin, in plugins section.
Is it possible to export reservations to csv or other formats ?
Modern booking allows to export list of reservations to CSV format.
With excel or other software you can easily convert csv to xls, xml and other formats.
I don't want to use payments, can I disable them ?
Yes, reservations can be made without redirecting user to payment page.
Can user cancel his own reservations?
Can I disable specific days ?
Modern booking allows you to disable days based on date and weekday.
For instance you can completely disable reservation for every Monday, Tuesday, etc. or dates like 2018-10-05, 2018-10-06, etc.}
Where I can change terms and services link ?
Terms and services link and text can be found in language files, please see main folder /language/en-GB/en-GB.com_universal_booking.ini