So, long story short, The First Flame got its name from a specific thing in the story; Arylos's real identity. I liked the idea of it originally; had a level of mystery with some foreshadowing.

However, I'm starting to fall out of love with it and I'm considering changing the name. The story still has like another year to go before it's done so that's not my concern, but is there still much of a point at this point? Overall, the current title really only applied before you know who he is but now that we're past that point, it has less meaning.

its your story you should change it to your liking 
but at the same time keep the title enticing 
all and all its a webnovel, it wont be a world ending thing to change the title.
but if you refuse to change it you can start giving names to volumes instead of changing the entire story title

I wouldn't change the title until you're done the story. My concern is that it might confuse the readers of make it difficult to find. I know I was reading one where the name and cover changed, and it took me a while to find it again. But I read way too many stories, so they're had to keep track of sometimes.

I would probably advise against it. This is what your readers know your story by.

If you can't stand it and really want to change it, do so (it's your story after all), but I would recommend keeping the old title in parentheses at least for a while.

For example:

Old title: The First Flame

New title: Cranky Cranberries (The First Flame)

Yes, this is a "Grapes of Wrath" reference. No, don't take any offense please 

All fair points. I think for now I'll keep the title the same. I don't plan to rerelease it unless I go through with my artist adapting it into a light novel which is possible but expensive and means he has to give up freelancing; I'm not comfortable with him doing that yet. I'll just see how it goes for now, but I do agree that putting the old title in parenthesis would be helpful.

Plus, that means having to redo the cover text and the gif in my signature and I'm quite frankly too lazy for that.

I'm not familiar enough with your story to say for sure, but The First Flame sounds like an interesting enough title. I think that even if the title is found to be incorrect in the story later on, it isn't as if it disqualifies it as the title fo the book. Bonus points may be warranted if there is a different character, idea, etc that is found by the end of the story to have the title or deserve it etc, but I think your story can function perfectly fine otherwise.

What matters to me is that the title actually has something to do with your story, and it sounds interesting. There are many stories published out there that have awful names for their stories (whether by their own choice or the publisher's) and have little to do with the actual story.