Tried the older versions, don't see much difference. I'm starting to get suspicious it might be some problem with my graphics driver or smth, I don't know :-/
It's still better than just default TF2 with low settings, but the difference back than was very significant. I put it like this - when I move my mouse on the desktop, or in the game menus, just slightly faster, it's not smooth but I rather see "multiple cursors" along the way (not optical illusion). And that time, the change was noticeable even in the menus, the mouse was smooth as well as the menu animations. And gameplay-wise the same, when I moved the mouse to look around, I could see the trasition. Now the picture gets "distorted" along the way.

Well, I am sure I wrote a reply on a reddit post to a guy who advised me to use your config the same day I found out how good it was, because I remember closing the game after two matches to write that reply with joy. And that reply says 19 days ago.
So I would think that the version must have been 6.5.0-b9 (released 21 days ago) and not 6.5.0 (released 18 days ago) as stated on github. But can't be 100% sure about that.
So there's no point in trying out the older version now, it wouldn't work properly, right?

So I can run an older version constantly without updating the config? Because back then, after the new install I surely downloaded the most recent version, as I've been doing since. I thought you are supposed to do that.
As I can see now in the config archive on github, there was a new version coming out quite often around that time. Luckily, I know the exact date I used the first config - March 17, so I will try the older config preceding this date.
Thx for the tip!

Hello, I have a slight problem with the mastercomfig. Few weeks ago, I almost gave up on TF2 but then found this config with decently easy install instructions and after installing the game and applying the comp preset, the game ran great. To put it clearly - before that, I was not able to use a sniper rifle or play scout because of the FPS, but with the config it was playable again (subjectively 2x faster and smoother). But then I tried the badgpu and badcpu addons to test if it can be further improved. It actually made it worse, so I deleted them and from that time I can't get the initial great performance I got from the comp preset alone that one time.
I tried the clean up method, I tried even reinstalling the game, deleting all TF2 folders from steamapps folder, and applying the config on the clean install as in the past. Well, I can see the difference in visuals (no ragdolls, etc.), but I'm just not getting the FPS I experienced when first applying the config weeks ago. What might be the problem?

BTW Is it okay when I change some crucial settings after installing the config (I need fast weapon switch, minimized hud, minimized viewmodel, hit sounds, ...) - does it cause problems to the config when I change these settings in the options afterwards?

Using Xubuntu 16.04, Lenovo B560 with Nvidia 310m card (340 proprietary driver).