While working on sqldeveloper with the version mentioned on the title I found that is is suddenly hangs when I press on another SQL worksheet.
1- This issue happened many times with me without any reason or fixed time.
2- This issue is happening only with this version of sqldeveloper.
3- I user windows 7 64 bit.
4- Using the default java version which is already included in sqldeveloped.
5- After 5 or 10 minutes of the hang I end the process of sqldeveloper and open it again to start developing.
Regards.