Redmine Upgrade & GitHub Integration

My Redmine 2.6 instance is running on a Windows server and needs to be brought up to the latest stable release. I want the upgrade carried out safely, keeping every project, issue, user, attachment, and setting intact.

Once the core migration is complete, I need GitHub fully integrated so that commits, pull-requests, and issues flow into Redmine as expected.

There are several custom plugins in the current setup. I will provide a list of the ones I still need; the rest can be removed. For each plugin we keep, please locate or compile a version that is confirmed to work with the new Redmine release and make sure it loads without errors.

Deliverables
• Complete upgrade to the latest Redmine on Windows, database included
• Verified GitHub integration (OAuth, web-hooks, repository links)
• Selected plugins installed, tested, and documented
• Brief hand-over document covering steps taken, configuration changes, and a rollback plan

I will supply RDP or SSH access to the server and an initial full backup. Let me know your timeline and any preliminary questions—once everything is stable and tested, the project is done.