Cannot delete Events from Trash Bin (PHP-Error: Call to undefined method)

Hello,
I just recently installed JEvents 3.4.44 on my Joomla 3.8.5. Site
Apart from the good-looking layout of this component I found a little bug or typo.
I wasn't able to empty the trash bin.
The error was:

Fatal error: Call to undefined method Joomla\CMS\Application\AdministratorApplication::input() in /PATHTOJOOMLA/administrator/components/com_jevents/controllers/icalevent.php on line 1461

In this file it on line 1460 and 1461 it says

	    $app    = JFactory::getApplication();

	    $jinput = $app->input();

where instead it should say

	    $jinput   = JFactory::getApplication()->input;

Changing the first to the second solution solves the problem.
Please fix this, it is a annoying bug.
with kind regards,
karlsifko