QGIS » QGIS Application

I have two issues to raise, second one is due to me trying to fix my first issue :S

I have been having an issue with QGIS for a few months now (used to work perfectly before for over 2years), for some reason whenever I am using QGIS to navigate files and folders, QGIS uses single click to open files and folders instead of selecting. This issue persists when using plugins but does not occur when using 'QGIS Browser Panel'. My default file manager 'caja' is set to use double click.

I'm running QGIS 2.18.1 on Linux Mint 18 'Sarah'.

I tried doing sudo apt-get remove --purge qgis and removing /usermnt/.qgis2 folders to no avail. Also tried installing latest version of LTR QGIS 2.14.x but that had the same issue.

Latest thing I tried is to use locate -bir qgis and deleting all the folders that were related to QGIS. Some of the ones I found were in

• /usr/lib/python2.7/dist-packages/qgis
• /usermnt/.qgis2
• /usr/lib/qgis
• /usr/share/qgis
• ~/.config/QGIS/

Now I am getting the following error upon launch:

An error occurred during execution of following code:
import pyplugin_installer

Traceback (most recent call last):
  File "", line 1, in 
  File "/usr/lib/python2.7/dist-packages/qgis/utils.py", line 607, in _import
    mod = _builtin_import(name, globals, locals, fromlist, level)
ImportError: No module named pyplugin_installer

Python version:
2.7.12 (default, Nov 19 2016, 06:48:10) 
[GCC 5.4.0 20160609]

QGIS version:
2.18.1 'Las Palmas', 0cfd7d8

Python path:
['/usr/share/qgis/python', u'/usermnt/pavel/.qgis2/python', u'/usermnt/pavel/.qgis2/python/plugins', '/usr/share/qgis/python/plugins', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-x86_64-linux-gnu', '/usr/lib/python2.7/lib-tk', '/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload', '/usermnt/pavel/.local/lib/python2.7/site-packages', '/usr/local/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages/PILcompat', '/usr/lib/python2.7/dist-packages/gst-0.10', '/usr/lib/python2.7/dist-packages/gtk-2.0', '/usr/lib/python2.7/dist-packages/ubuntu-sso-client', '/usr/lib/python2.7/dist-packages/wx-3.0-gtk2', u'/usermnt/pavel/.qgis2//python']

Followed by:

An error occurred during execution of following code:
pyplugin_installer.initPluginInstaller()

Traceback (most recent call last):
  File "", line 1, in 
NameError: name 'pyplugin_installer' is not defined

Python version:
2.7.12 (default, Nov 19 2016, 06:48:10) 
[GCC 5.4.0 20160609]

QGIS version:
2.18.1 'Las Palmas', 0cfd7d8

Python path:
['/usr/share/qgis/python', u'/usermnt/pavel/.qgis2/python', u'/usermnt/pavel/.qgis2/python/plugins', '/usr/share/qgis/python/plugins', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-x86_64-linux-gnu', '/usr/lib/python2.7/lib-tk', '/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload', '/usermnt/pavel/.local/lib/python2.7/site-packages', '/usr/local/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages/PILcompat', '/usr/lib/python2.7/dist-packages/gst-0.10', '/usr/lib/python2.7/dist-packages/gtk-2.0', '/usr/lib/python2.7/dist-packages/ubuntu-sso-client', '/usr/lib/python2.7/dist-packages/wx-3.0-gtk2', u'/usermnt/pavel/.qgis2//python']

And when I try to open Plugins/Manage Plugins, I get the following:

An error occurred during execution of following code:
pyplugin_installer.instance().showPluginManagerWhenReady()

Traceback (most recent call last):
  File "", line 1, in 
NameError: name 'pyplugin_installer' is not defined

Python version:
2.7.12 (default, Nov 19 2016, 06:48:10) 
[GCC 5.4.0 20160609]

QGIS version:
2.18.1 'Las Palmas', 0cfd7d8

Python path:
['/usr/share/qgis/python', u'/usermnt/pavel/.qgis2/python', u'/usermnt/pavel/.qgis2/python/plugins', '/usr/share/qgis/python/plugins', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-x86_64-linux-gnu', '/usr/lib/python2.7/lib-tk', '/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload', '/usermnt/pavel/.local/lib/python2.7/site-packages', '/usr/local/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages/PILcompat', '/usr/lib/python2.7/dist-packages/gst-0.10', '/usr/lib/python2.7/dist-packages/gtk-2.0', '/usr/lib/python2.7/dist-packages/ubuntu-sso-client', '/usr/lib/python2.7/dist-packages/wx-3.0-gtk2', u'/usermnt/pavel/.qgis2//python']