If updating Blender one must also update the Hard Ops / Boxcutter packages for the latest version.

(2.8)BoxCutter 712_20
(2.8) HOps 0098_1 Californium_30

1. Firstly ensure Blender 2.8 is up to date. https://builder.blender.org/download
https://github.com/DotBow/Blender-Version-Manager/releases

2. Ensure the latest zips are downloaded from the markets.
Blendermarket
https://www.blendermarket.com/account/orders

Gumroad (log into your account to view product on sales page)
https://gumroad.com/library

Sales Pages
https://gumroad.com/l/hardops
https://gumroad.com/l/BoxCutter
https://gumroad.com/l/hopscutter

3. Copy the contents of the zip to the addons location.
C:\Users\YOUR USER\AppData\Roaming\Blender Foundation\Blender\2.80\scripts\addons Remove any old HOPS / BC folders. Never overwrite.

3a. Or use install from file. But this only works if the folder is not there already! Otherwise… issues.
Make sure the folders are not there and it should work fine.

(DO NOT try to install it on the blender install itself. That has shown to not work. ex: C:\Users\RUSER\Desktop\Blender Builds\2.8-updater\Git-f18373a9ab1a-25-May-23-18\2.80\scripts\addons – this is not the right place. See 3.

4. Open Blender and enable the add-on. I delete my config so blender would open cleanly without config.

4a. If using install from file. As shown in the video. It will isolate the addon for enabling. After enabling do not double click while waiting. Just give it a second if you know you clicked it. Registrations can take a moment sometime.

And then Blender is able to be loaded and the addons enabled. Errors indicate that the HOPS/BC installation is possibly old and requires redownload. Also make sure it is installed in the correct path.
https://hardops-manual.readthedocs.io/en/latest/installation/

I nuked out my prefs and did a clean install just to help a guy on facebook. its important to ensure tools are working with the latest blender builds so there’s no better way to start my day.

https://gumroad.com/l/BoxCutter