JH> I have several other lines in the .ini file such as:
 JH> 
 JH> 21:3/100_dir_prefix          = c:\mystic\files\fsx_
 JH> 46:1/156_dir_prefix          = c:\mystic\files\agora_
 JH> 1337:3/100_dir_prefix        = c:\mystic\files\tqw_
 JH> 618:500/1_dir_prefix         = c:\mystic\files\mcn_

This was not an option in A45.  It was added in A46.  If it doesn't work
after upgrading please let me know.  There was someone else having a problem
with this even in the A46 version so there is probably a bug somewhere that
needs to be uncovered.

--- Mystic BBS v1.12 A46 2020/06/11 (Windows/64)