The original dictionaries are in KOI8-R  ... to convert to UTF8, do this:

      iconv -f KOI8-R -t UTF-8  <infile>  >   <outfile>

Morphological dictionary encoded in *.db files; to convert
to the current form, run these scripts:

time ./mkroot.pl > stem.dict
time ./mksuf.pl > suffix.dict