Fllow Orders.
0. Close MyEclipse Application(if you wanna replace jar file).
1. Fill usercode
2. Fill systemid
*. myeclipse active dialog show
*. Press Button to Generate id
3. Tools->RebuildKey {Create or Replace [private/public]Key.bytes (if not exists in current folder).}
4. Press Active Buttom
belows not options
5. Tools->ReplaceJarFile
*. choose MyEclipseFolder->Common->plugins
*. it will replace SignatureVerifier.class and publicKey.bytes in jars under plugins folder, opreation will do together.
6. Tools->SaveProperites
*. MyEclipse Startup Will Read This File to Active Product.
7. Open MyEclipse Application.