You folks are probably catching zzz's now, so I'll cast a wet blanket over something while you can't hit me.
No, it is
not a good idea to delete
/home/yourusername/.cinnamon
... sorry Stan
... depending on whether you chose Delete or Move To Trash, if the latter it can be recovered. Also having a Timeshift snapshot would allow easy recovery, in minutes.
Yeah did not generate this folder himself, it comes with the install and is created after your first boot/reboot.
I can show this with my Tina, installed yesterday, and Yeah, this also shows some use for Terminal.
For my /dev/sdc15 . where I have my Tina, yours would likely show as /dev/sda1 or /dev/sda2 or similar.
These commands usually generate the same result (not always)
chris@TinaCinnamonSSD:~$ sudo tune2fs -l /dev/sdc15 | grep 'Filesystem created:'[sudo] password for chris:
Filesystem created: Thu Oct 10 12:22:10 2019
and
chris@TinaCinnamonSSD:~$ sudo dumpe2fs $(mount | grep 'on \/ ' | awk '{print $1}') | grep 'Filesystem created:'
dumpe2fs 1.44.1 (24-Mar-2018)
Filesystem created: Thu Oct 10 12:22:10 2019
... means I installed Tina my Thursday at lunchtime.
The .cinnamon folder is created either on your first boot, or shortly thereafter, perhaps with the first change you make.
The same applies with the other DEs (Desktop Environments) eg .mate for MATE, KDE, GNOME &c - some do it differently.
The .cinnamon folder will contain a minimum of 2 -3 subfolders either in the 1st session after install, or shortly thereafter, being
backgrounds
configs and perhaps
spices.cache (empty by default)
SCREENSHOT 1 - TINA DOT CINNAMON CONTENT - 1ST LEVEL
Inside those are files and perhaps more subfolders, and the files include .json files which contain settings, either default or as your changes make them.
If you make power settings changes, changes to panels, etc - it grows, so mine at 2nd level now looks like this
SCREENSHOT 2 - TINA DOT CINNAMON CONTENT -2ND LEVEL
None of these did I create - but they were created with my customising.
Here endeth the Post, next - a little more wet blanket
Wiz