Did the manual update - there's is still a nasty error in the bookable item detail. Seems some database column is missing or wrongly named:

1054 Unknown column 'c.color' in 'field list' SQL=SELECT c.title, c.text, c.color, c.show, c.date_up, c.date_down, c.time_up, c.time_down FROM jos_booking_closingday AS c JOIN jos_booking_closingday_subject AS s ON s.closingday_id = c.id WHERE subject_id = 42

Item list and reservations look fine so far (not wasted too much time on testing though as the above error occurred)

1054
Virhe: 1054

Unknown column 'info' in 'field list' SQL=SELECT info FROM gwfrc_booking_payment WHERE alias = ''

I can not make reservations :( My customers can neither :( What to do?

edit. + I can not edit my reservations at Joomla backend side.

An error has occurred.
1054 Unknown column 'provision' in 'field list' SQL=UPDATE `gwfrc_booking_reservation_items` SET `reservation_id`='354',`rtype`='2',`subject`='2',`subject_title`='Mökki 1 / vuorokausi',`from`='2014-06-27 14:00:00',`to`='2014-06-29 12:00:00',`capacity`='1',`occupancy`='{}',`price`='48',`deposit`='0',`fullPrice`='48',`fullPriceSupplements`='48',`provision`='',`fullDeposit`='0',`tax`='10',`message`='' WHERE `id`='362'

You had old version before update. Run CPanel -> Configuration -> Error Log -- Refresh Database.

Hi!

My webhotel doesn't have CPanel. I asked my webhotel guy what to do. He told you must talk about restoring backup before Joomla update. I copy-pasted this to him: "Run CPanel -> Configuration -> Error Log -- Refresh Database."

He doesn't understand what you mean. At basic database there is not thing called "refresh"?

I cleared all cache at Joomla. Didn't help.
Do you have any idea what to do? I still get error when trying to make a reservation.

No, I mean CPanel of Booking. It is labeled Control Panel.

Oh dear! I must be little dumb. I messed up "the" CPanel and Control Panel...
Thank you :) Now it's working.