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With Windows 10 64bit you can also install the Windows subsystem for Linux. This let you use a more recent version of astrometry.net, the same as with Ubuntu.
But this require a 64 bits build of CCDciel because the Linux environment cannot be initialized from a 32 bits program.
As there is almost no 64 bits ASCOM drivers available this is not an option for now and I not provide it.
If you want to try the instruction below you have to compile CCDciel for 64 bits from source first.
Follow the instructions to activate the Windows subsystem for Linux on your computer and install the Ubuntu variant.
After the installation is complete, open the Ubuntu window to execute the following Linux commands:
First you need to update the list of packages:
sudo apt update
Then upgrade the libraries to the latest version:
sudo apt upgrade
Finally install astrometry.net:
sudo apt install astrometry.net
Download the index files depending on your image scale, for example down to 16 arc minutes you need the indexes 06, 07, 08-19.
sudo apt install astrometry-data-2mass-08-19 astrometry-data-2mass-07 astrometry-data-2mass-06
Alternatively you can also use the index that are already installed on the Windows system by editing the configuration file:
sudo nano /etc/astrometry.cfg
For example if the index are in C:\cygwin\usr\share\astrometry\data add a row:
You can let the Cygwin path blank in the astrometry preferences