Upgrade subscription button

Hi Tuan,

I would like to have the plans signup button the same as the upgrade subscription button. The OSM translation accepts a span class of my template so I was able to realize the sign up button with a shopping cart icon. But this is obviously not possible with the corresponding translation text for the subscription update button. I tried an override of the button class of "upgrademembership/default.php" but this didn't work.
How to get it fixed?


www.mathelike2016.mathelike.de/lizenzen/...n-im-ueberblick.html


www.mathelike2016.mathelike.de/mein-konto/lizenz-erweitern.html

Login:
www.mathelike2016.mathelike.de/Anmelden.html

user: demo
PW: Mathelike2016

Thanks for your help in advance!

Christian