NVM - Got it to work! Here is the solution for anyone else with this problem:
In file attributeManagerConfig.class.php just find line
CODE
$this->add('AM_USE_SORT_ORDER'
- that is around line 59
In 2.5 it reads as
CODE
$this->add('AM_USE_SORT_ORDER' , true);
,
and in 2.4 by default it is set to false, so just change it in 2.5 to
CODE
$this->add('AM_USE_SORT_ORDER' , false);
and there won't be any errors regarding Unknown column 'products_options_sort_order' in 'order clause'