After launching the app, you will see the Remopia icon on the top menu bar if you are using a Mac, and at the bottom of the screen if you are using Windows. On a Mac, hovering over the icon will open the Remopia menu, while on Windows, right-clicking the icon will do the same.
The menu will open, allowing you to check the settings.
If you see a message like "Do not automatically launch the app when the PC starts" as shown in the image below, it means that automatic launch is currently ON. Conversely, if you do not want the app to launch automatically, you can click "Do not automatically launch the app when the PC starts" to switch to manual launch.
By default, Remopia is set to launch automatically after the PC starts. If you intentionally set it not to launch automatically or perform a logout, Remopia will not start automatically the next time you turn on your PC.