UPDATE -- OrchidWiz Encyclopedia X4.1
If you already have a full version of X4 installed on your computer, you need only download the latest update. Click the link below to download the X4.1 update, December 2017:
FULL DOWNLOAD -- OrchidWiz Encyclopedia X4.1
The download will start automatically. Do not click "Click here to start the download" or you will start a second download. This will delay the first download (and cause confusion). If you look at the bottom left side of your browser, you should see the file being downloaded. After the download finishes a few hours later, click DISK1.zip. It will open a new window showing the files contained therein. From that window header menu, click "Extract All" and then select "Extract." This extracts all the files from the zip file and puts them in a folder you select (the default "Downloads" folder works fine).
The default location may be called Downloads\DISK1\DISK1. Open that folder and double-click Setup.exe. A window might come up saying "Windows protected your PC." Click "More info," and then click "Run anyway." That should start the installation.
If you wish to download the individual installation files, one by one, they are located here:
You will need to have all the files under the same folder in your computer before double-clicking Setup.exe to start the installation.