Most of the time, I use WinRaR for archives, however in some cases I find Opus extremely useful for viewing archives, especially Flat View, so I'd like to get best of two world by doing the following
- With a normal
Double click, open WinRaR as always - With
Alt+Double clickopen Opus internal zip viewer
In order to make GO open an archive, this settings must be set

But at the same time, it changes the default Double click behavior, so WinRaR is not prioritized.
I tried to workaround that by making changes in Types, setting Alt+Double click to GO and Double click to <not defined>. It works, as soon as Opus restarts, Double click action gets overridden and it makes internal Opus archiver prioritized again.
I though that it gets overridden only when the value is <not defined>, so I tried to bypass that by FileType SHELLEX, but after restart it got replaced back to GO again.

If I disable internal Opus Zip support, click events don't get changed upon restart, but at the same time, GO no longer opens archives internally.
P.S I know that I can make the other way around, assigning WinRaR to Alt+Double click and leaving Opus to Double click, but it's not acceptable for me.