Windows 10 Install Arduino IDE Problems Again!

[MotoDog]

Decided to up-grade Arduino IDE version, tried ALL day yesterday. I get introductory screen for a second. But IDE doesn't run. Screen closes and Nothing!
Wish I would have left things alone!

I just know it is a Windows 10 problem. Something left over after removing working version Arduino?
Tried ZIP files moved to directory, and older versions Arduino. Just don't want to re-install Windows quite yet? Windows also up-dated during all this? Great...
Thanks for any help.
Still Hating Windows 10, Mike

[missdrew]

Remove 'C:\Users<USERNAME>\AppData\Local\Arduino15' replace with your computer username.

[MotoDog]

I found an empty folder AppData and lots of User Names?
No AppData\Local\Arduino15 found using windows search of C: drive?

Is my windows password my computer username?

Thanks Mike

[missdrew]

start a command prompt
in the command prompt type the following (enter at end of line)
cd AppData
cd local
rmdir /q /s Arduino15

[MotoDog]

rd /q/s Arduino15 did something? HD ground for a minute?
rm not accepted as valid command?
Thanks, Mike

[MotoDog]

Yes!!! Thanks Mucho!
IDE Opens up NOW!
Whoopee!
Mike

[missdrew]

Glad you got it working, had a space in there by error - I have edited the above post to clarify the instructions for any future people who find this.

[MotoDog]

YOU got it Working, were those files hidden by Windows?
Thanks, Mike

[pert]

They are hidden by default. On Windows File Explorer, you can make it visible by opening the "View" menu, then checking the box next to "[] Hidden items".

You can also get to it by clicking the link at the line following File > Preferences > More preferences can be edited directly in the file in the Arduino IDE's preferences.