If your question fits in one sentence you did not explain it enough. It is also clear that you have put zero effort in solving this issue yourself. See also [ Please read before posting a question ] -- How To Ask A Good Question

We are volunteers, none of is going to take the time to sit next to you and work through the documentation. You'll have to do that yourself. I'll close this question until you have made some changes.

Hello, This is a comprehensive tutorial on "Bioinformatic Analysis of MicroRNA Sequencing Data". mirPRO is used in the tutorial as part of the analysis pipeline. Find this book chapter here https://doi.org/10.1007/978-1-4939-7710-9_8 Thank you, Ahmed