OK - read the link. There is an update for BIAB 2017. It does mention a fix to the "Save As" command. I installed the update - the problem still exists.
Oops sorry missed this part, in my last longwinded reply.
Yes there was a problem with the "Save as" in 2017, but this was a separate issue concerning the file name not being saved with the new file.
This fix was to address a totally different issue than you are describing.
Sorry I can't be of more help, but possibly Onyx will be able to sort out the issues, I know it has helped me in the past.
Also when you do run Onyx, it will create a report in the main window and will note any permission problems it can not fix.
Sometimes this information can be useful too, possibly seeing a screen shot of that log may help.
- Jay