The Shell Cmds popup menu items are configured in:
Settings->Preferences->Interface->Shell Commands
This runs a dialog that lets you Add/Del/Edit the items in the main menu popup. Possible options are:
Add a new menu item/script:
click Add
in the Label box, change the word "new" to the desired menu label
in the Commands box, type the command lines to be included in the script
(for example: Label => gimp; Commands => gimp)
check-OK in the Commands window
check-OK in the Shell window
click on OK or Apply in the Preferences window (WILL NOT TAKE EFFECT UNTIL CLICK)
Del to delete an existing menu item (for example manual):
select to highlight an entry in the Cinelerra: Shell listbox
click Del
check-OK in the Shell window
click on OK or Apply in the Preferences window (the entry is destroyed)
Edit an existing menu item:
click Edit
select to highlight an entry in the Cinelerra: Shell listbox
click edit (the edit dialog appears)
set the label and/or commands to the new desired values
check-OK in the Shell window
click on OK or Apply in the Preferences window