How can I change the text in the welcome tab? See screenshot.
Moved to third party area. Perhaps check your language manager in the phrases to see if the third party expert has that as a phrase. If so, you can change it there. If not, you'll need to check with the expert who made that.
Can anyone help me here?
You should ask the expert who made that as you shouldn't have to pay for them to make it as a phrase so that you can change it. It should be a phrase by default. Please send them this forum thread so that they can fix this issue. Things like that MUST be multi-lingual for clients without a need to pay.