I don't know what changed and I don't know how to set it back,
but now Super+E launches
baobab instead of Nemo.
I have check the keyboard - shortcuts configurations. and Launchers/Home Folder is associated to Super+E.
There is no custom shortcuts.
So my issues are of 2 types:
the shortcut configuration seems correct in cinnamon panel,
still it launches the wrong application(baobab), which doesn't appear in said configuration.
What can I check and correct to get back default behavior: Super+E => Home folder?
A package name to reinstall the default bindings would be ok as well.
EDIT: when downloading with Firefox, "show in folder" menu trigger nemo, but When downloading with chrome, "show in folder" trigger baoab.
So chrome seem to use the same information as cinnamon to launch nemo, but which one ?
PS: So far I didn't found any answer that solve this specific issue (including on askubuntu.com.
lsb_release -a ouputs
No LSB modules are available. Distributor ID: LinuxMint Description: Linux Mint 18 Sarah Release: 18 Codename: sarah