If you are coming from a version earlier than the 01 May 2000 production release, please see 
TWikiUpgradeTo01May2000 first.
These are the steps you need to perform to upgrade the 01 May 2000 version to the current Beta version:
-  Create a TWiki directory below the data directory.
 
-  Delete the following files in your TWiki.Main installation:
-  
BillClinton , GoodStyle , RegularExpression , TextFormattingFAQ , TextFormattingRules , TWikiAdministration , TWikiCategoryTable , TWikiDocumentation , TWikiEnhancementRequests , TWikiHistory , TWikiImplementationNotes , TWikiInstallationNotes , TWikiNotificationOfChanges , TWikiPlannedFeatures , TWikiPreferences , TWikiUpgradeTo01May2000 , TWikiUsernameVsLoginUsername , TWikiVariables , TWikiWeb , WelcomeGuest , WikiName , WikiNotation , WikiTopic , WikiWikiClones
 
 
-  In all your webs, change references to topics that moved to the TWiki.TWiki web:
-  Change topics: 
TWikiUsers , WebNotify , WebHome
 
-  With links to: 
TWikiPreferences , TWikiVariables , TWikiUsers , TWikiWebsTable , WelcomeGuest
 
 
-  Move your 
TWikiWebsTable topic to TWiki.TWiki.
 
-  Merge your changes to 
TWikiPreferences into TWiki.TWikiPreferences , then delete Main.TWikiPreferences
 
-  In case you customized 
TWikiRegistration , merge your changes back into TWiki.TWikiRegistration , then delete Main.TWikiRegistration .
 
-  In case you have authentication: Change 
.htaccess to reflect the new location of the TWikiRegistration , i.e. 
 ErrorDocument 401 /cgi-bin/view/TWiki/TWikiRegistration
 
-- 
PeterThoeny? - 20 Aug 2000