Several instances
There can be several instances of Desktop JForex4 run on one computer.
Windows OS
Right click the Desktop JForex4 icon in the Windows 10 taskbar and select Desktop JForex4 to run another instance.
Mac
The only way you can actually run multiple copies of an app on macOS is through a custom script. In spite of how that sounds, the process doesn't demand any technical knowledge and is largely straightforward.
First, open the pre-installed Script Editor program on your Mac. This is easiest to find by opening Spotlight with Cmd + Space and searching directly for it.
When you launch Script Editor, you'll see an empty document-like editing window. Here, you'll need to first copy and paste the following line:
do shell script "open -n"
Next, locate the Desktop JForex4 app in the Applications folder. Drag and drop its icon right before the second quotation mark. You should have the following code:
do shell script "open -n /Users/satoshi.nakomoto/JForex4/JForex4.app"
You can also download this script file below and change the path to the app in the Script Editor.
Press Cmd + K to compile the script, which should take a second or two. Lastly, hit Cmd + S to save the file. Give it a name, set its location, and most importantly, select Application in the File Format dropdown. Click Save and you're all set.
Navigate to the directory where you saved the file. When you double-click the icon, it will initiate a new instance of Desktop JForex4 app. You can repeat the action depending on how many copies you want.