To get FS One up and running, download and install item 1: the base installer file (2022a) and the latest update (2022e). You may also need to install items 2 and 3. See the blue note below to determine if you need items 2 and 3.
FS One 2022a base and the 2022e update: Downloads via Dropbox
Joystick Gremlin (Release 13.3): https://whitemagic.github.io/JoystickGremlin/download
vJoy (vJoySetup.exe, Release 18.104.22.168): https://github.com/jshafer817/vJoy/releases/tag/v22.214.171.124
For news on software updates and new content releases, subscribe to the FS One newsletter: https://michaelselig.substack.com/
Only download and install FS One from trusted sources. FS One is presently only officially delivered from Dropbox as well as from the FS One page on the Internet Archive. You do not need a Dropbox or Internet Archive account to download the files. The Dropbox link includes the base installer (ISO file), the current update, and DLCs (downloadable content packages). The Internet Archive link only includes the base installer and update.
To get started with your setup, see the FS One 2022 User Manual. A brief summary is below.
 If you are using a legacy FS One V1 or V2 interface from prior versions of FS One, you will not need to download/install items 2 and 3 above.
 If you use an RC transmitter that has USB simulator output, (e.g. some Spektrum radios and most all OpenTX radios, and many others), then items 2 and 3 above may not be needed. See the “Getting Started” page in the FS One User Manual, and find the note called out as “Approach 4” for more details.
 If you are going to use an InterLink controller, you will need to download/install items 2 and 3. See the “Getting Started” page in the FS One User Manual, and find the sections that discuss using the InterLink controllers.
FS One requires a USB simulator controller. This can be an RC transmitter that acts directly as a joystick such as the Spektrum NX series RC transmitters and ones from FrSky and RadioMaster. It can also be a USB InterLink® simulator controller or some other. Another option is to use a USB interface that connects to the trainer port of your transmitter. The user manual steps through example setups.
Joystick Gremlin and vJoy: Joystick Gremlin and vJoy feed FS One with your joystick axes in the order that FS One requires. After you finish your joystick setup, when you run FS One, you will also run Joystick Gremlin at the same time (every time). Inside FS One, the USB interface that you select will be the one named “vJoy Device”.
Your Own Transmitter: An alternative to using Joystick Gremlin + vJoy is to use the channel reassignment features in your transmitter. That maps your transmitter outputs to match the order required by FS One. This feature goes by various names on different brand transmitters. See the FS One “Getting Started” page in the user manual for more details.
FS One V1 and V2 USB interfaces: For users with an FS One V1 or V2 USB interface, you will not need to install Joystick Gremlin or vJoy. FS One 2022, though new, is backward compatible and should be familiar to you.
As with any new simulator, follow the instructions in the user manual to make your setup process go as easy as possible.
Install both FS One and FS One Updates as Administrator. If you are going to use the FS One Power Tools app that installs with updates to FS One, see the additional instructions in the User Manual | Power Tools section.