Receiver welcome screen customisation

Hello,
i’m working for a long time with Version 4.7.10. Now I have updated to the newest release.
Now I have the problem with the Receiver welcome screen customisation. I have strukture the welcome text with some html code.
But that isn’t working anymore.

I’ve read something on Github

but I don’t understand what is to do.

I hope anyone have an idea and can assist me.

Many thanks in advanced

best regards