I had the same issue, and thought it was just something messed up on my machine. Fix is easy - the updater for some reason doesn't have write access to some files in the folder. I'm guessing that the previous hotfix messed up the permissions. (Repair permissions in Disk Utility only repairs OS X system file permissinos... it doesn't know what permissions are supposed to be for apps or user data files.)
Update AC 17 permissions:
In Finder, go to Applications > Graphisoft > ArchiCAD 17
1. Right click the folder and click on Get Info
2. Click the faded gold padlock in the bottom right and enter your admin password to unlock the permissions panel
3. Give the owner (probably you), group (probably admin) and 'everyone' read/write access
4. Click the gear icon at the bottom of the Info window and click on "Apply to enclosed items..." This will copy those full read/write privileges to all files within the AC 17 folder.
Now, run the update again.
One of the forum moderators
AC 26 USA and earlier • macOS Ventura 13.4, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB