Windows 10: Trying to add folders in Win 10 mail app

I'm new to Win 10 and have been setting up everything on a new HP desktop this weekend. I created extra folders in the inbox on the old desktop email account for ease of use and want to do the same on the new desktop. I have followed the helpful information on MicroSoft's page:
How do I add or remove folders in Mail for Windows 10?

Mail for Windows 10 Outlook Mail for Windows 10
but the + sign doesn't appear. Also tried the directions in Troubleshoot and nothing works, I went to the Store and checked for downloads/ updates. Nothing helped. What am I doing wrong? Thanks for your help! Diane

:)

 

Mail app will not open on 10041.


Hello Adam,

This is the suggested solution below if you haven't already tried it.

In this Windows 10 build 10041, the Mail, Calendar, and People apps may be broken due to a licensing issue with the Store Beta. To get these apps working again, you need to follow these steps:

• Open powershell as administrator
• Run the command Get-appxprovisionedpackage –online | where-object {$_.packagename –like “*windowscommunicationsapps*”} | remove-appxprovisionedpackage –online
• Re-install Mail, People and Calendar from the Store (green tile)

 

Windows 10 mail app crash when emptying folder

Hi,

In order for us to identify the reason why Windows 10 Mail app is crashing when emptying a folder, we'd like to get the following information:

• Have you made any recent changes or applied an update to your device prior to this issue?
• Are you getting any error messages or error codes? If yes, send us a screenshot.
• What happens when you try emptying a different folder? Does the same issue occur?
• What troubleshooting steps have you tried so far?

For initial troubleshooting, we suggest emptying a folder in Windows 10 Mail app using the steps provided in the article below and then check if the same issue will persist:

How do I empty a folder in Mail for Windows 10?

Looking forward to your response.

 

cannot create folders in windows mail app


when I go to 'more' in the mail app and click + a dialog display appears however when I enter the name of a new folder and click enter it appears momentarily in the folder list then disappears and a message appears at the top screen saying that the action could not be completed. I have tried the suggestions from the windows help site but nothing works. it appears that my only solution is to uninstall and reinstall the app, however that is not possible because I don't want to lose all my e-mails and accounts.
I think that the problem is definitely with the app and not some weird Windows thing because I can create new folders with my Gmail account.
Any suggestions will be appreciated, thanks in advance