We plan to address this in Rapise 6.7 by adding Chromium-based rendering engine. 

But if you still with Rapise 6.6 or earlier there is a workaround to make it looking good again. You need to enter single registry key;

 

[HKEY_CURRENT_USER\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION]
"Rapise.exe"=dword:00002af8

 

And re-start Rapise.