Ability to play files in a folder without interruption?

Is there an option in the program to play all files in a folder without interruption? If I click on any single file it'll play, but by default it doesn't move to next the file.

Not yet as far as I know.

You may find this script that integrates Foobar2000 with Directory Opus useful.

I certainly liked it ! I liked it enough to have my titlebar toolbar include it.
Normally, I just use it for long nature sound tracks when I'm deep in isolated thought.
But if you want to Rock or whatever it can do whatever you need !

I have a few albums from my local Charlie Parr that I guess at least one was once used in an Australian advertisement for something called 'Vodafone' whatever that is.

Put this in a button

@nodeselect
@async:"C:\Program Files\foobar2000\foobar2000.exe" {filepath|noterm}

Then all you have to do is select a folder with audio files in it and click the button. It will play all files in the folder.

What kinda of files? Video? Audio? Something else?

Audio files mainly. Although video files play similarly when you click on them in dopus.

But just like how clicking on any one file will play it, I want it to play the other files that follow it in the folder, like it's a playlist.

It can depend on the audio player, but Galaxyhub's suggestion above should work with Foobar2000, or at last did last time I tried it. (Select all files you want to play, then click a button which runs that command.)

You need to select the files you want to play before starting the player.

The player in dopus just starts playing when you click on a file. Selecting multiple files doesn't play them sequentially. The player just stops after one song.

Don't click, run Play.

It's here by default:

Yes.
I have it working now. I was selecting the audio files and running play but I cheated by using the mouse to 'fast forward' to near the end of the song. In that case the next audio file did not start playing without pressing the play button or the next/previous arrows.

Edit Note:
Playing an audio file within the viewer pane does not play more than one file no matter how many are selected. Clicking on a different file does change the audio output to that.