New format of user_id fails with intval check

Due to a change of the id-schema in the Mangopay API, the user_id is no more a pure int value but has now a format like user_m_<some_id>

In the function get_mp_user in mangopay.inc.php there is a check

if(!$mp_user_id || $mp_user_id=="" || intval($mp_user_id)<=0){
return false;
}

which will always fail due to the changed format. This function is for example called when the user wants to see the wcv_shop_settings.

Is there any chance for an updated plugin version soon? The last update is quite a while ago and I am afraid this is not the only issue in the plugin due to the id-format changes.