SplitOrJoin 0.2 split big file in many peaces but save this: file - 4.txt and i want: file4.txt

SplitOrJoin 0.2 split big file in many peaces but save this: file - 4.txt and i want: file4.txt
here the tool: https://www.sendspace.com/file/o2fo4s

Edit by Mr Wolfe
This question is for clarification of a previous question
https://www.experts-exchange.com/questions/29068538/text-file-problem-I-have-many-files-that-end-up-like-this.html