It appears in my win7 pc, but not in my win10

… Ever since I got a second monitor a month ago, Finale no longer displays two dialog boxes …

… I hope I don't have to Reset Preferences again! …

This issue has been discussed before.

Unfortunately it seems that the culprit is the Preferences file.

However, instead of clicking the button “Reset All Preferences” you can try something else:

Quit Finale.

Move the Preferences file to another folder (e. g. to the Desktop) so that Finale can not find it.

Launch Finale.

When it is launched, Finale will build a fresh, new Preferences file - and (hopefully) the dialog boxes will display on the primary monitor at their default location.

And where do you find the Preferences?

I am not sure, but try this:

Go to

C:\Users\<username>\AppData\Roaming\MakeMusic\Finale

Actually there are two different Preferences files (or INI files, as they are called): 

"FINMIDI.ini" and "Finale.ini"

PS

It might be a good idea to make a backup copy of the Preferences file(s).

Then, if the Preferences get corrupted, just replace with the backup copy.

Did it all and those two dialog boxes still don't appear.  I just get nothing.  Everything else works fine. It's bizarre and it's frustrating!

By the way, that's a great way to test and see whether Resetting the Preferences will fix something.  In this case it didn't, so I'm glad I didn't actually Reset them!

Any other help would be greatly appreciated!  I used those dialog boxes a lot and the workaround are really tedious!

… Any other help would be greatly appreciated …

Something else to try:

Change the monitor’s resolution.

Chances are that the dialog boxes will appear inside the screen area, when you have changed the resolution.

     This is maddening.

     I changed every monitor setting I could find (they are already both on the highest settings).  I even unplugged the new monitor and went back to the old, etc. etc, These two dialog boxes simply do not appear.  Everything else works fine. The only thing I haven't tried is reinstalling Finale.  Not sure how I'd even do that. 

     Has anyone else ever seen such a problem?

     Is there a workaround?  Another way to access those boxes?  Some margin editing I can't do manually.  

Perhaps it is time to contact the folks in Tech Support.

Specify the steps you've already taken, so that they can rule out things.

Oh, boy.  Wish me luck.

No luck so far. I specified the steps already taken, and they asked me the same questions I had just told them.  I was then instructed to uninstall and reinstall Finale, which took 3 hours and didn't help.  Those Blessed Dialog Boxes are still No Call/No Show.  

Peter, you said "This issue has been discussed before." Where?  What was said?  I depend on those dialog boxes to pay my bills.  There's some music I can't work on without them. 

… Peter, you said "This issue has been discussed before." Where? …

Here are two recent threads:

https://makemusic.zendesk.com/hc/en-us/community/posts/360003932794-Dialogs-not-opening-displaying 

https://makemusic.zendesk.com/hc/en-us/community/posts/360005459374-The-Edit-Margins-dialog-box-desapeared 

… What was said? …

Only what was also said in this thread, sorry.

Yeah, they're not just hiding, they're actually not opening.  If any other dialog box is open, I can't edit anything else until the box is closed. But with these two, I select the item

Page Layout > Systems > Edit Margins

or

Page Layout > Page Margins > Edit Page Margins

 and I can still edit the doc fine, as though nothing was open. 

At this point I begin to suspect demons. :-/