Contributing code changes for PortableAppsPlatform

Please forgive me if this has been answered/documented somewhere. I have looked and couldn't find anything.

TLDR
I have coded a new feature and would like to know how to submit it to be considered for inclusion in PortableAppsPlatform.

Details
I was looking for a way to set environment variables (specifically the PATH) globally for all the portable apps I use. I know i can modify them for each individual app, but it saves a lot of trouble by doing it in one place.

While searching to see if it was possible, I came across someone who had the same question (https://portableapps.com/node/25963). Since it didn't appear to be possible, I got the source code and added the functionality myself.

Now I'd like to submit the changes to be considered for inclusion in the next release. I was not able to find any instructions for how submissions are accepted. Any help would be appreciated.