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The solution I found was separated from the model options so that my friend could import it when he needed to use one. I also believe that it wasn't a question of the number of sprites, since it works normally on my PC. Answering the questions:

1.  The problem seemed to be more in the obs, as it kept stopping from time to time during the recordings. I'll talk to him about this option you told me about, maybe it will improve performance
2.This was happening in the latest version of the app. Both he and I downloaded it from Steam, but I imagined that if he downloaded the program from here, the problem would be resolved. It didn't do much good.
3. I didn't know that there is this option to reduce the frame rate, I discovered the application recently. Thank you very much for the information, I'll be passing it on to him.

In a way the problem was "solved", although the option to change models in PNGTuber Plus itself would be much better for it. Thanks for the tips and I'll be passing them on! ^^