This software is completely free. If you really want to exchange money for this software, please consider donating what you can to a charity that you believe in.
Boyd, R. L. (2018). WELP: Word Embedding Likeness Perusal (v1.03) [Software]. Available from https://ryanboyd.io/software/welp
The latest version of WELP can be downloaded here:
Version 1.03, released on 2018-08-23
WELP Source Code on GitHub: link
WELP is currently only being developed for Windows. You will need to install Microsoft .NET 4.6.2 or later to run this software.
There is a good chance that this software could be compiled to run on non-Windows machines via Mono (although it does have a Microsoft.VisualBasic.FileIO reference). However, I have not personally tried this yet.