Windows Live Mail version 2011 v. 2012 and Mail on Windows 10

Split from this thread.

Hi Firedog...  I recently upgraded to Windows 10 Home from Windows 7 Home Premium Edition 64-bit SP1 after finally resolving issues with "Windows Update not responding" and high CPU usage in Windows 7.  Once all that was fixed, I was able to download all the updates and install them and everything worked great.  I then downloaded Windows 10 through Windows Update and installed it.

Everything installed smoothly to Windows 10 including my mail program.  I have been using Windows Live Mail 2011 for years and it is currently working perfectly in Windows 10.  All my emails, folders, contacts, mailing lists, calendar, et all remained intact and the program is working properly. 

I have not tried to open the new Windows 10 Mail App.  I like Window Live Mail and would like to continue using it, but I'm afraid to switch to the new app.

Now here are my questions...

1. Can I just continue using Windows Live Mail 2011 since it is currently working satisfactorily?
2. Is there any danger that WLM 2011 will quit working and losing my emails or contacts?  If so, is there a way to back them up?
3. Should I update to Windows Live Mail 2012 even though I've read there have been some issues with Windows 10?
4. Can I open the new Windows 10 Mail app to see how it works and still keep Windows Live Mail?
5. Does the new Mail app retain my current mailing lists?  Does is allow mass mailings? (I currently send out some mailing to about 100 contacts at a time.)

Thanks for your time...

Bob-B-Que in North Carolina

"A Connoisseur of Fine Swine"