Hi Sander,
Each instance has its own private settings, including all user preferences.
It is very easy to copy your preferences for instance #0 to other instances. Do the following:
- Locate your PixInsight settings file. On Windows XP:
%APPDATA%\Pleiades\PixInsight.ini
The %APPDATA% path is usually "C:\Documents and Settings\<user_name>\Application Data".
- Open the INI file on any plain text editor. Locate the block of settings for each instance. A block of settings begins with a [nnn] tag. For example, the block for the first instance starts with [000], the second one with [001], etc.
- Copy the first block (which begins with [000]) and paste it to replace the second block (which must begin with [001], so don't replace the initial tag). Do the following with the rest of instances, if there are more. Note that you can also create settings blocks for new instances, even if they haven't been executed yet.
Save the file and start two instances of PixInsight. Your second instance will have now the same settings as the first instance.