I deleted a third party payment gateway, but after I deleted all their files (catalog directory) and removed the mod from the modules->payment, the gateway is still listed in the payment modules listing (red dot).

My question is why deleted payment gateways are still nested in the payment modules listing. I checked everything multiple times and all files are deleted!

ps. I did not mention the name of this mod since it is not officially supported by Zencart. I just hope you guys can guide me to generic solutions on how to TOTALLY remove payment gateways.

Thanks!