Downgrade from KDE 5 to KDE 4
2136
How to roll back Ubuntu to a previous version?
105231
How to downgrade a package using dpkg
83078
What is KDE, GTK, GTK+, QT, and/or GNOME?
140906
Install Desktop Environments or use different distributions
33540
How can I switch a 32-bit installation to a 64-bit one?
62426
Should I use KUbuntu or Ubuntu 16.04 for KDE Plasma desktop environment?
72615
How do I restore my KDE desktop to default?
151516
How can I install MonoDevelop v4 on 12.04?
43778
Is it possible to "upgrade" from a 32bit to a 64bit installation?
67481
How to revert a do-release-upgrade?
4046
How can I get the latest JRE / JDK as a zip file rather than EXE or MSI installer?
102441
Having trouble with apt-get upgrade and removing KDE Plasma
61437
how to convert a application which is built under WPF 3.0 to 4.5
7969
Can I downgrade SQL Server 2008 R2 Standard To Web Edition?
151690
How do I downgrade from Yosemite 10.10 to Mavericks 10.9?
126343
How to downgrade a package via apt-get?
81183
How can I set env variables so that KDE recognizes them?