low FPS issue with rtx 4060

[Kauket]

Hi everyone,
I'm an old player (back from 2019). I decided to get back here after all this time because i wanna now try how FL feels on my new pc. i had a laptop back in the days but now my rig is made of a Ryzen 5 5600x and RTX4060 + 32 GB of ram (win10).
When i launch FL, the fps counter (the gamebar one) shows between 180 and 200 fps. However once i go into multiplayer, it goes down to 60-70 fps. The curious thing is that once done that, if i get back to the main menu, it gets capped to those 60 fps as well, despite at the beginning they were 180.
I googled for a bit, and i've found few topics in here talking about the fps limiter (the jittery thing - haven't touched it), another one about doing alt+enter 2 times (done but nothing), and also about the fact that this issue happens because FL is based on DX8. In another topic there's a user that talks about finding a solution inserting a specific file in the folder, but unfortunately that other topic is gone (and the thread was old anyway).
Does anybody have a solution for this?
Let me know if you need more details about my rig, or anything else.
Thank you in advance

(also hope i posted this in the correct place, it has been so long since last time)

try this plugin, place the .dll to your /EXE/ folder

https://github.com/crosire/d3d8to9/releases

completely safe to use

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