Cannot revert upgrade from 2.9.7 to 2.9.6

[geoffcallender]

When I try to revert I get this in the Error Log:

An error occurred while collecting items to be installed  
  No repository found containing: org.eclipse.update.feature,com.anjlab.eclipse.tapestry5.webtools.feature,2.9.6  
  No repository found containing: org.eclipse.update.feature,com.anjlab.eclipse.tapestry5.feature,2.9.6  
  No repository found containing: org.eclipse.update.feature,com.anjlab.eclipse.e4.tapestry5.feature,2.9.6  
  session context was:(profile=epp.package.jee, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).  

None of the above has an Exception Stack Trace.

Here's their Session Data:

eclipse.buildId=4.4.2.M20150204-1700
java.version=1.7.0_71
java.vendor=Oracle Corporation
BootLoader constants: OS=macosx, ARCH=x86_64, WS=cocoa, NL=en_US
Framework arguments:  -product org.eclipse.epp.package.jee.product -keyring /Users/geocal/.eclipse_keyring -showlocation
Command-line arguments:  -os macosx -ws cocoa -arch x86_64 -product org.eclipse.epp.package.jee.product -keyring /Users/geocal/.eclipse_keyring -showlocation

[dmitrygusev]

Hi Geoff,

Could you tell me what you did to downgrade?

The reason for failure is probably because of the way I do releases. Every new release replaces all references to previous version in the update site, so there's just one reference to latest version.

However all previous features & plugins are still there, and should be available for manual downgrade:
http://dl.bintray.com/anjlab/eclipse-tapestry5-plugin/

[geoffcallender]

To revert I used About Eclipse > Installation Details > Installation History, chose previous configuration and clicked Revert.

[dmitrygusev]

Thanks, I'll see if I can add support for this kind of downgrade.