Hi,

I found out that I had only Guide 9.0 installed and not 9.1 ! The problem comes from the fact that both update files (to 9.0 and 9.1) are both named "Guide9.zip". I now copied the new version (!) of the "Guide9.zip" file (in fact it should read "Guide9.1.zip") into my Guide main folder and now it says Guide 9.1 in the main window and version 10 July 2017 in the help file.

So, it seems that, if you are coming from Guide 8, you can apparently update to Guide 9.1 either in two or in three steps:

Three steps approach:

-first install Guide 9_8 zip from here (file is at the end (!) of the page): https://www.projectpluto.com/new.htm
-then install Guide 9.0.zip from here (file is at the beginning (!) of the page): https://www.projectpluto.com/new.htm
-then install Guide 9.1 from here: https://www.projectpluto.com/update9.htm

Two steps approach:

-first install Guide 9_8 zip from here (file at the end (!) of the page, not the one at the beginning): https://www.projectpluto.com/new.htm
-then directly install Guide 9.1 from here: https://www.projectpluto.com/update9.htm

But this doesn't necessarily resolve your moons problem !

Rudi