This version is compatible with every earlier Apache release (since 2.0.0.alpha1). Any upgrade of Apache IvyDE should work without any worries.
The reverse is not true, downgrading is not supported and may break your configuration.
Apache IvyDE expects to be used with a version 2.1 or superior of Apache Ivy. In order to use some OSGi features, an Ivy 2.3 or superior is needed.
Apache IvyDE has been maintained to be compatible with Eclipse 4.3 (aka Eclipse Kepler) and superior.