Ok, i’ve made everything to work 100% perfect.
First thing, i’ve done what Queue said me to do - delete the entire Patch (with ipf files) folder.
Then verified the files through Steam, and redownloaded about 200 mb of data.
Then, i’ve opened the game a few times, untill it says the ipf error. When this happens, instead of changing the Release version to the latest one, i’ve changed to the previous one, 147684.
The patcher updated correctly, the release version updated to the latest, the game opens and runs fine.