Open the .doc file in Word in Vimfiler

I am the author of vimfiler.

vimfiler#set_execute_list(), but as you can see from the vimfiler documentation, if you don't use the <Plug>(vimfiler_execute_vimfiler_associated) mapping, the effect is
No, it does not appear in the action list if you press a because there is no special action.
This mapping has not been mapped anywhere due to historical reasons, so please map it to a key somewhere to use it.

<Plug>(vimfiler_execute_system_associated), but this is not vimfiler#set_execute_list() but refers to system associations.
It works very differently.

In this case, the doc file happened to be associated with WORD, and the behavior is the same, so you must have misunderstood.

Resolved.

Press a after selecting a file in Vimfiler to display the action list, but select x among them to launch Word and display the file.

x<Plug>(vimfiler_execute_system_associated)