Version: 2.3.7

Hello,
I have just updated to the latest free version. However, when I should change from PHP 5.3 to 5.5 so I meet this problem.

Strict Standards: Only variables should be assigned by reference in /home/xxxxxx/public_html/administrator/components/com_booking/booking.php on line 42

Strict Standards: Non-static method AImporter::defines() should not be called statically in /home/xxxxxx/public_html/administrator/components/com_booking/booking.php on line 48

Strict Standards: Non-static method AImporter::importFile() should not be called statically in /home/xxxxxx/public_html/administrator/components/com_booking/helpers/importer.php on line 150

Strict Standards: Only variables should be assigned by reference in /home/xxxxxx/public_html/administrator/components/com_booking/defines.php on line 29

Strict Standards: Non-static method AImporter::helper() should not be called statically in /home/xxxxxx/public_html/administrator/components/com_booking/defines.php on line 62

Strict Standards: Non-static method AImporter::import() should not be called statically in /home/xxxxxx/public_html/administrator/components/com_booking/helpers/importer.php on line 161

Strict Standards: Non-static method AImporter::importFile() should not be called statically in /home/xxxxxx/public_html/administrator/components/com_booking/helpers/importer.php on line 34

Strict Standards: Non-static method AImporter::importFile() should not be called statically in /home/xxxxxx/public_html/administrator/components/com_booking/helpers/importer.php on line 34

Strict Standards: Non-static method AFactory::getConfig() should not be called statically in /home/xxxxxx/public_html/administrator/components/com_booking/defines.php on line 63

Strict Standards: Non-static method AImporter::helper() should not be called statically in /home/xxxxxx/public_html/administrator/components/com_booking/helpers/factory.php on line 44

And many more of these.

What is this?

Regards,
Andreas