Yesterday I have downloaded the new version, but it could not even install, was having problems with some missing files or whatever. I did not bother much about it for now, as I have to work on a project tomorrow. So I re installed the previous version, which worked just fine before I had uninstalled it.
My problem now is that the IDE cannot upload to the board. I have done what i found in forums, and re installed the drivers. Now, in my Device Manager, I can see it as UNO, but the IDE cannot connect to it. It is giving me this result.
Arduino: 1.6.0 (Windows 8), Board: "Arduino Uno"
avrdude: ser_open(): can't open device "\.\COM4": The system cannot find the file specified.