Migrating Netbeans class libraries between versions - TEERA 2.0
NetBeans preferences are stored in your profile, which in Windows is a folder structure rooted at: C:\Documents and Settings\<yourUserName>\.netbeans\<versionNumber>
The problem with this folder structure is that it mixes IDE settings with things like the local library collection and worst of all, a local class-information cache and file history (under the var folder). The whole thing can grow to quite a size (mine's well over 80MB).
The key subfolder appears to be config. I managed to migrate all the most important (and time-consuming) settings by copying these folders from one version to the next:
This doesn't quite do everything – docking window positions and toolbar button sizes are obviously stored somewhere else, but I can live with this.
I've voted for this to be fixed: see http://www.netbeans.org/issues/show_bug.cgi?id=42157