Try good ol' Easy Q.
Alot of Lmms users, Gps and others and me included, use that.
And it's the best free one out there. Sometimes, even better than most of the paid Eq plugins.
Here's a link to the site, that has it.
http://www.rs-met.com/freebies.html
Okay:
I suggest making a test project, and saving it, to see how it works, on your PC/mac.
Then open back the test project, then close it and then open it back later etc.
And see what happens.
So far, Easy Q works well, on my good ol' low powered PC.
So hopefully, it works well on yours too.