On line 309 of Plug-in (in latest version, for other versions look for the line that has)
SYM = SYM + SYM2
This line is saying to use Symbols and then numbers (SYM2).
Change it to
SYM = SYM2 + SYM
this then will make it try to use numbers first then when it runs out of numbers 256 of numbers since it'll go up to Hex numbers and up to 2 digits as well then it'll use symbols.