 MaxiFinder is a program designed to identify complex cellular functions encoded by genes in microbial genomes. It does this by integrating the identification of each individual gene with the identification of the molecular system in which it resides. This allows for more accurate and efficient annotation of cellular functions. Additionally, several new features have been added to make the code more user-friendly and easier to maintain. A new search engine has been introduced to help users find the best candidate systems and suboptimal ones that meet the model's constraints. MaxiFinder and its updated models are now available on GitHub. This article was authored by Naren, Bertrand, Denise, Remy, Kalutzi, Charles, and others.