* Some icons in the Qubes Manager application might not be drawn correctly when using the Xfce4 environment in Dom0. If this bothers you, please use the KDE environment instead.
* For other known issues take a look at [our tickets](https://github.com/QubesOS/qubes-issues/issues?q=is%3Aopen+is%3Aissue+milestone%3A%22Release+3.1%22+label%3Abug)
It is advised to install updates just after system installation to apply bug fixes for (some of) the above problems.
Downloads
---------
See [Qubes Downloads](/downloads/).
Installation instructions
-------------------------
See [Installation Guide](/doc/installation-guide/).
Upgrading
---------
### From R3.0
The easiest and safest way to upgrade to Qubes R3.1 is to install it from
scratch and use [qubes backup and restore tools](/doc/backup-restore/) for
migrating of all of the user VMs.
Users of Qubes R3.0 can upgrade using [experimental
procedure](/doc/upgrade-to-r3.1/).
### From R2 or earlier
When upgrading from earlier versions the easiest and safest way is to install
it from scratch and use [qubes backup and restore tools](/doc/backup-restore/)
for migrating of all of the user VMs.
Alternatively you can [upgrade to R3.0
using](/doc/releases/3.0/release-notes/#upgrading) first, then follow the
instructions above. This will be time consuming process.