Ive reported the same situation (PM to Stephan224). What I can advise - uninstall STB and install again. In my case it helped - I am checking it for whole day and its ok now.
Thx for advise, after 4 days my bot crashed, after started it again all settings are lost and I could not select an exchange or currency anymore. Uninstall and install was the only solution. Also had some problems with (not) updating the data (or graphs) as well and why there were was so little tradings action. Did not see the error mentioned by timondv, maybe I missed it...
Sended an email to Stephan with my experiences and update-errors with the bot.
Hope he can resolve them in the next update.