Paint.NET is a very nice PaintShop Pro alternative for Windows. And luckily, Pinta is fantastic Linux alternative of Paint.NET.
I had Pinta installed in my Debian 8.0 (Jessie) and it was stuck at version 1.5.
I actually use Pinta’s Ubuntu repo to install it and as it turns out I needed to change the repo to reference the “Trusty” version to upgrade to Pinta 1.6.
When I changed as such, the upgrade reported depedency problems with mono, specifically it seems mono v4 must have recently came out.
To resolve my issue i had to first purge pinta and mono-runtime, then reinstall them.
sudo aptitude purge pinta mono-runtime
#Pinta deb http://ppa.launchpad.net/pinta-maintainers/pinta-stable/ubuntu trusty main deb-src http://ppa.launchpad.net/pinta-maintainers/pinta-stable/ubuntu trusty main
Then update and install:
sudo aptitude update sudo aptitude install mono-runtime pinta
Pinta should now be v1.6.
You may also want to look at Krita, which is in the Debian repositories – good luck!