Thanks, this seems to open up the particle editor. Another problem though, and I'm probably an idiot for asking, but how do I actually open particle files? I go open, I select the custom .pcf I have downloaded, but after that it just doesn't open and goes back to as if nothing happened. Furthermore I can't see any of the alienswarm particle effects that come with the game, I don't intend to use them but I thought I would've at least been able to see them from this particle editor menu, unless I have to extract them or something.
It's 4am here and I'm a little tired so I wouldn't be surprised if I've done something wrong, but if I'm able to get help again it'd be appreciated :P
Haven't tried much more since this post, but I still can't figure it out still, is anyone able to help?
Also i need a second opinion on this and some help too,

Do those waterfalls look too bright? I thought they did a bit, but maybe it's just me. Regardless, is it possible to somehow dim the texture a bit without modifying the .vmt, vtf or the maps lighting? Also a side note, I have adjusted those waterfall textures so they don't look so identical
Also I'm using the TF2 waterfall texture for it as you may be able to guess