For all the LMMS users who might want to use LV2 plugins on windows machines, there is a way.
Firstly, go and download Element by Kushview, version : 0.41.1. You can find it in github.
Secondly, download Carla from kx.studio site. Attention! Just this release will work : version - Carla 2.4.1
Install Element by Kushview (don`t forget to install the vst2 plugins in your Vst Plugins folder) and extract Carla in your Program Files folder.
Open LMMS and after that open KV Element from Vestige (not the fx one, that one you can open in the mixer channel) and go to your Carla folder, after that go to Carla.VST folder and drag the CarlaVstShell in the Element plugin. A patchbay will appear, click on it and Carla will now open in LMMS.
If you use no embedding settings in LMMS, just make sure that when you open a LV2 plugin, for example Vitalium, you should re-open the patchbay, which otherwise will go behind the other LMMS windows and the Vitalium plugin will not open in Carla, if you don`t do that. I did not verified without embedding so I don`t know to advise you on that!
Do not forget to connect the modules in Element for audio input and output. For Carla, there is the midi input to Carla midi output (the orange dots) and Carla audio input to audio output (the green dots), which will be 2 to 2, otherwise you will hear the sound in just one channel.
Now you can open Carla in LMMS and use LV2 Plugins.