Alternative way for installing
If you want more control, then you can do the install steps separately.
Download the file with tar.gz extension. If you have 64-bit Linux, then use file with x86_64 suffix, otherwise use the one with i686 suffix (run uname -m in terminal if you are not sure which you have).
Unpack the file and run the installation script.For example, in Ubuntu command line you could execute following commands:
tar -zxvf thonny-1.1.0b7-x86_64.tar.gz
cd thonny
./install
This will install Thonny under apps directory in your home directory. If you would like to install to a specific location, then you can specify parent folder for Thonny folder eg:
sudo ./install /opt
Uninstalling
Excecute the uninstall command shown by the installer, eg.
sudo /opt/thonny/bin/uninstall
