I have installed Qlik Sense 3.2.0 version in server. I need to downgrade this Qlik Sense server to Lower version may be 3.1.5 or 3.1.
What would be the right process to re-install this version.
Please help me with this.
Uninstall first and re-install older version.
Would doing this removes QMC Tasks and Users?
It shouldn't as long as you don't remove the repository database during the uninstallation - it definitely doesn't when you upgrade, not 100% sure about downgrading.
..... but don't forget the 3 B's, as in Backup, Backup & Backup.
It would be embarrassing for you if you downgraded, lost some stuff and had to admit you had no backup.
Absolutely, needless to say, the following steps should be followed during any upgrade/downgrade:
Upgrading Qlik Sense ‒ Qlik Sense
Retrieving data ...