Upgrading from 4.2 tp 4.4 error

[United We Stand]

Hello, 

 

Just wondering if any of you have experienced this error when upgrading the suite from 4.2 to 4.4 

[[Template core/admin/system/upgradeDeltaThemeConflicts is throwing an error. This theme may be out of date. Run the support tool in the AdminCP to restore the default theme.]]

Ive disabled all the plugins, application and deleted the themes beside the default generated? 

 

How do I get passed this issue? Thanks in advance!

[bfarber]

As you're on a pretty old version at this point, you may need to download the full package from your client area, then upload it to your server manually before proceeding with the upgrade (by visiting /admin/upgrade/ directly for your site). The autoupgrader works for quite some time between versions, but occasionally we have to make bigger changes that the older autoupgrader can't account for.