What are procedures on upgrading javaparser-core.jar?

[IdeaHunter]

I did the following:
0) Bumped IKVM to newer version and verified its working and have no performance degradations

1. Compiled new version from javaparser github
2. Got javaparser-core-3.26.3.jar
3. Replaced file and reference to it in JavaToCSharp project file
4. Cleaned and rebuild solution

Although its working, for sore reason its magnitude slower that javaparser-core-3.25.4.jar

Did i missed some steps?