display of checkbox group in mail / thank you message

I have a checkbox group named "Seminar" with several entires.

In the thank-you-message and the mail the entreis are displaye with square brackets and quotation marks:

in the chebox group I have:

Seminarzentrum bei BernSeminarzentrum bei Aachen

As result from  {data:Seminar} I get:

["Seminarzentrum bei Bern"]

or when both are marked

["Seminarzentrum bei Bern", "Seminarzentrum bei Aachen"]

I would like to get them as without square brackets and quotation marks like:

Seminarzentrum bei Bern, Seminarzentrum bei Aachen

or 

Seminarzentrum bei Bern; Seminarzentrum bei Aachen

How can I do that?

Thanks Max.

When is the next update scheduled? And is there a workaround (just in case)?

Hi silvinho

Please try this again with the new update