You need a password to delete the menu inside. Please check the help and see the system management there. A lot of them are written in it.

See if it is an SQL database, find someone who understands SQL, or delete the menu with statements.

Generally used dishes cannot be deleted, because it is illegal after deletion, and the system can't find the previous information.

If not, try to find out that one dish in the software has stopped, and all the dishes have stopped, and then reset it.

There is another problem, find the administrator's number, open the system, and then operate, because the administrator's account is the most authoritative, and all operations can be carried out.

See if the software is suitable for your store. If not, buy a new one.

There are too many brands of catering software now, so it is most important to find a suitable one.

If you can't find a software vendor, you have to consider future services, and there will be many problems.