New version 2.5.1 is available!
https://github.com/OperationNT414C/CtrBootManager/releases/tag/2.5.1
It adds support for B9S v1.2.
Even if it cannot directly chainload some B9S v1.0 payloads (like Luma3DS v7.1), I found a trick: it can chainload CtrBootManager9 v2.5.0 then this previous version can chainload B9S v1.0 payloads.
It seems that the 3DSX version cannot chainload anything under Luma3DS v8.0 so I used the previous trick to check 3DSX version validity.
Even if there was no evolution for 3DSX version, I updated my compilation tools version so I had to do some code changes to recompile it (it seems that new compilation tools allowed to gain about 10KB on the 3DSX binary final size). I hope it still work under MenuHax in order to load CFW: I don't have the courage to flash my 9.2.0 NAND to check it.
EDIT: I just noticed a crash at start with the A9LH version (CtrBootManager9.bin). I will see how I can fix this when I have some time.