Yes but I have both anyway
Best thing for you to do if you are sure its the Liberators is remove them from over your ports
Use mission ed and load your scr and zoom to area over your port and look for the Liberators
Click on the Liberator so its highlighted and press delete on your keyboard - gone
Save your scr and they shouldnt appear - use
save scr as command
Might be best to make a back up first in case of any problems
If when you leave port there are no liberators and the game doesnt CTD then that was the problem