Bleachbit Icons Missing in usr/share/applications on Lubuntu 18.04 LTS

It seems that your are trying to break normally working system.
Do not copy files into the directories which are controlled by APT system!

If you want to (re)install BleachBit - use its official deb-packages from repository with commands shown below

sudo apt-add-repository universe
sudo apt-get update
sudo apt-get install --reinstall bleachbit

and you will get its icons in place:

• /usr/share/applications/bleachbit-root.desktop
• /usr/share/applications/bleachbit.desktop

I see these icons on for example:

• Lubuntu session:

  

  You can change this icons from ugly variant to pretty by doing right mouse click on the menu item, visiting Properties and selecting /usr/share/pixmaps/bleachbit.png as image file to get

  

• LXDE

• MATE DE

  

If you want to get newer BleachBit 4.2 - you can use some thirdparty PPA like this, so install using commands below:

sudo add-apt-repository ppa:kelebek333/apps
sudo apt-get update
sudo apt-get install bleachbit

Reverting to 2.0 is possible by sudo apt-get install ppa-purge followed by sudo ppa-purge ppa:kelebek333/apps .