Opening Journal, opens a new JMP window

[#1]

Wondering if this is a setting-specific, or JMP thing...

Example: I have JMP open, have been using it, etc., and I go to open a Journal that I have made, it will open a new JMP window, so now i have two JMP's open, instead of opening in the JMP that already IS open. 

Is there a setting I need to update??

It drives me insane because it never used to happen to me. 

Using JMP 18 FWIW.

Thanks!

[#2]

Usually this is the reason JMP Note 639556 - Problem Note 52261: New instance of JMP® is opened each time a new file is opened... 

[#3]

不用双击打开，把需要打开的文件拖放在正在打开的JMP就可以