If you want to check which LongoMatch version you are currently using, you will need to: 

1. Open LongoMatch app and select "LongoMatch" from the top bar. 

2. Select "About" from the drop-down menu. 

3. A pop-up window will show up with the number of the version you are using.  

Whenever there is a new LongoMatch version available, if you are connected to the internet when you open the app, a pop-up window will appear informing you that there is a new version and you will be able to download it from there. If you want to do it manually, you will have to select the option "Check for updates" from the same drop-down menu as mentioned before and download it from there.