That's a mouthful.
Download the latest release here: https://github.com/smilligan93/Sr5-Exporter/releases
Launch the file, this will open in it Hero Lab and ask you to install it.
- If updating, it may mention that the folder exists. Generally you want to override this
Once it is installed, open up your shadowrun character in Hero Lab.
- In the File menu, go to Save Custom Output
- Select Universal VTT
- Click Output
This will open up the file in a web browser.
Copy the json output and paste it wherever you would provide Chummer output.
Not everything is exported, see the mentions in the file. If you find a bug (and trust me, they're there) please make a github issue for it.