a bug effects creating pdf, colors and input of decimals in property bar

Can anyone help?

I use CorelDraw 6 (home & students) and all of a sudden I cannot make any pdf (the file is empty and shows and enlargement of > 4000%). I read about the decimal discussion on this forum but it's not the solution. Also I do not see the settings option when publishing to PDF.

Secondly ... i cannot put any numbers after de , in the toolbar when resizing of repositioning and image or textblock.

Thirdly (yes) the colors on the toolbar below show black and the used colors seemed to have dissapaerad.

I already deleted the corel draw software and reinstalled it. But the problem is still there I was using the version already since july 2013 and all of a sudden these changes /bugs appear?