Editing the plugin config folder

Hello. I am using the ChestLockGUI plugin on my server for a few days now and I noticed that I cannot lock more than 50 containers. I went into the plugin folder and I went to edit config.yml. I changed the lock limit to 9999 and also I added Smoker, BlastFurnace and Barrel to the list of containers you can lock. I pressed save, restarted my server but the changes did not take effect. The limit is still 50 and I still can not lock Smoker, BlastFurnace and Barrel.

Please help.

Thanks.

This was the original:

https://prnt.sc/qapaiq

And this is what I changed it to:

https://prnt.sc/qapanl

Saved it and restarted the server but still doesn't work.

Yes, it did save. The changes are there. I know that because the default container lock limit was 50 and now I set it to 99999 and I have more than 70 locked chests and furnaces for sure. The problem is that I cannot also lock blast furnace, smoker and barrel.
Edit: I just noticed, when I started the server about 10 minutes ago, I looked into the console and I got these messages:

https://prnt.sc/qasm5k

I typed Barrel, BlastFurnace and Smoker because this is the format that the other containers were in. The items which were made of one word (for example Chest or Hopper) were written with a capital letter and the items which were made out of two words (for example Trapped Chest, which in game are written trapped_chest) were written TrappedChest by default (the two words both with capitals letters and no underscore). So I tried adding Smoker, Blast furnace and Barrel using the same format but I guess the game doesn't recognize them. If I try writing for example minecraft:blast_furnace or minecraft:barrel or minecraft:smoker, do you think the plugin will recognize them?

Quote from Roman

I don't know that plugin, so try it out.

Did you already try to ask the plugin creator?

It is one of the first plugins that pops up when you go to the Plugins section. It locks your containers if you press ctrl+right click while looking at a chest/furnace/etc.

But what do you mean ask the plugin creator? How can I do that?