@bschaaf Thanks for pointing that out.
@jfcherng Time flows differently for me, but believe me, this still feels urgent for me. I looked in the folder, I found the .sublime_session files, but the content was not there. Here is an example
{
"contents": "",
"settings":
{
"buffer_size": 0,
"line_ending": "Windows",
"name": "[...$0.querySelectorAll('a')].map(a => {"
}
},
{
"buffer": 12,
"semi_transient": false,
"settings":
{
"buffer_size": 0,
"regions":
{
},
"selection":
[
[
0,
0
]
],
"settings":
{
"auto_name": "[...$0.querySelectorAll('a')].map(a => {",
"default_dir": "C:\\Users\\Qwerty\\Downloads\\x",
"syntax": "Packages/Text/Plain text.tmLanguage"
},
"translation.x": 0.0,
"translation.y": 0.0,
"zoom_level": 1.0
},
"stack_index": 2,
"type": "text"
},
That Downloads\x folder doesn’t exist.
I tried to look through all other directories, but nothing tangible. Seems I am out of luck. Welp 
Maybe I will start actually saving those files. damn
I wonder, can ST3 be configured to store session backups?