Java mode isn't working after installing Android mode

Hi everyone,

Few days ago, I installed Processing 3.3.1 and tested sevral codes with no problems. Then I installed Android Mode in processing and problem occured.

Java mode isn't working when I clicked 'RUN' button. Nothing happened. No error messages.

I deleted all of files related with android mode and processing and downloaded processing again. However, it didn't work.

And deleting preference.txt was also not effective.

What can I do? please help me.

I use window7, 64 bit. (I have never used eclipse or android studio in this computer)

Thanks.