Dreamweaver deleting automatically selected item on page when coding

since monday (as titled in subject) when i'm coding in dreamweaver version 13.1 build 6443 (mac osx 10.9) , selecting item (tag, image, script, ecc...) after second item automatically deleted programme.

i try reinstall situation has never changed. resetting preference , other...but nothing!

is there can me?

try creating new mac user account , see if still happens.

 

 

nancy o.

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