As I could not install the app from the Playstore because it is no more available, I downloaded it from a web-page and installed it as an APK.
On the Playstore you can find a lot of apps with the same name (different logo) and people asking for money.
After having instaled it, I can see I have the version 2020-07-10.
I would like to ensure that it is an oficial version and not a modified version created by people stealing the rights...
Thanks for your help!