What commands need to register in Everything to open a search in Directory Opus?

It helped me
Go to Menu> Settings> Customize Toolbars ...> Commands
plus click on User-defined Commands (xx)
in the first line after the header will be Add new User Command ..., click the right mouse button.
there will be a menu with paste, the following code should be inserted there.
The everything command will appear in the list (do not change the name, it will search for a command from the everything program)

<?xml version="1.0" encoding="UTF-8"?> 
<button backcol="none" display="icon" textcol="none"> 
   <label>everything</label> 
   <template>filepath,filename</template> 
   <icon1>#usercommand</icon1> 
   <function type="normal"> 
      <instruction>Go LASTACTIVELISTER</instruction> 
      <instruction>Go PATH="&amp;filepath&amp;" NEWTAB=deflister,findexisting</instruction> 
      <instruction>SELECT NONE</instruction> 
      <instruction>SELECT PATTERN="&amp;filename&amp;" DESELECTNOMATCH MAKEVISIBLE</instruction> 
   </function> 
</button>

go to settings everything
Tools> Options ...> Context Menu> Open Path> Command
insert the command Apply Ok

$exec("C:\Program Files\GPSoftware\Directory Opus\dopusrt.exe" /acmd everything FILEPATH="$pathpart(%1)" FILENAME="$namepart(%1)")