Tried, but to no avail.Try using the install.php file from the 1.5.0 package... that's what I had to do and it worked. Upload the install.php from the new package then you should be able to uninstall the old add on. (root/library/EWRporta/Install.php)
I now get this error when trying:
Invalid model 'EWRporta_Model_Blocks' specified XenForo_Model::create() in EWRporta/Install.php at line 161 EWRporta_Install->_uninstall_0() in EWRporta/Install.php at line 156 EWRporta_Install::uninstallCode() call_user_func() in XenForo/DataWriter/AddOn.php at line 193 XenForo_DataWriter_AddOn->_postDelete() in XenForo/DataWriter.php at line 1645 XenForo_DataWriter->delete() in XenForo/ControllerAdmin/AddOn.php at line 117 XenForo_ControllerAdmin_AddOn->actionDelete() in XenForo/FrontController.php at line 310 XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 132 XenForo_FrontController->run() in /var/www/html/admin.php at line 13
I also, foolishly, just completely got rid of the 1.4.4 Install.php. Hopefully I'm not going to end up needing it!