Originally Posted by dolphin_oracle
you probably have "save session at exit" enabled. Look in the xfce settings manager under "startup and sessions" I believe its called. There's a checkbox.
It wasn't checked, but it was a good hint; in "Session and Startup" there is a tab named "session" where you can choose a restart style
for each application you choose, changin values from inmediatley
does the trick, also there is the option to "clear saved sessions".
Thanks for the quick response.