I always like to install the full XWorkplace full over ArcaOS since I use the "Right click, Folder Action - Pack this tree" and some other feature like the OS/2 Kernel and WPS Classes view.
"Right click, Folder Action - Pack this tree" works fine, but it has no icon. Put an icon into System Setup-> Extended Menu Options-> Folder actions. Then add:
Path and file name: C:\sys\apps\xwps\bin\packtree.cmd
Parameters: %*
Working directory empty
Adjust the drive letter, as required.
It is also a good idea to modify C:\sys\apps\xwps\bin\packtree.cmd to change the ZIP parameters (in the command) to -r9yS. "y" handles symlinks, and "S" handles hidden, and system, files (case is important).
But now that I installed ArcaOS 5.0.6 I noticed it has XWorkplace 1.0.13.1 preinstalled, and I'm not sure if I should install version 1.0.13 full over it. And I'm not able to find any 1.0.13.1 installer.
Personally, I don't see any reason to do that. The installer should be available, but be aware that the non Arca Noae subscription package (which is at HOBBES) is missing a couple of things (which probably won't be removed, if they already exist). In fact, it is quite likely that 1.0.13.1 only changes the Arca Noae specific parts, so no freely available version would be needed, since nothing has changed.