diff --git a/src-tauri/nsis-hooks.nsh b/src-tauri/nsis-hooks.nsh
index f085d6b..a26c398 100644
--- a/src-tauri/nsis-hooks.nsh
+++ b/src-tauri/nsis-hooks.nsh
@@ -1,11 +1,50 @@
-!macro NSIS_HOOK_POSTINSTALL
+!macro GITTY_MIGRATE_LEGACY_DATA_DIR oldDir newDir
+  ${IfNot} ${FileExists} "${newDir}\*.*"
+  ${AndIf} ${FileExists} "${oldDir}\*.*"
+    CreateDirectory "${newDir}"
+    Rename "${oldDir}" "${newDir}"
+  ${EndIf}
+!macroend
+
+!macro GITTY_UNINSTALL_LEGACY_GITLITE rootKey
+  ClearErrors
+  ReadRegStr $R0 ${rootKey} "Software\Microsoft\Windows\CurrentVersion\Uninstall\GitLite" "UninstallString"
+  ${If} "$R0" != ""
+    ReadRegStr $R1 ${rootKey} "Software\git-lite\GitLite" ""
+    ${If} "$R1" == ""
+      ReadRegStr $R1 ${rootKey} "Software\Microsoft\Windows\CurrentVersion\Uninstall\GitLite" "InstallLocation"
+    ${EndIf}
+
+    DetailPrint "Removing legacy GitLite installation"
+    ${If} "$R1" != ""
+      ExecWait '$R0 /S _?=$R1' $R2
+    ${Else}
+      ExecWait '$R0 /S' $R2
+    ${EndIf}
+  ${EndIf}
+
+  DeleteRegKey ${rootKey} "Software\Microsoft\Windows\CurrentVersion\Uninstall\GitLite"
+  DeleteRegKey ${rootKey} "Software\git-lite\GitLite"
+  DeleteRegKey /ifempty ${rootKey} "Software\git-lite"
+!macroend
+
+!macro GITTY_CLEANUP_LEGACY_SHORTCUTS
   Delete "$DESKTOP\GitLite.lnk"
   Delete "$SMPROGRAMS\GitLite.lnk"
   RMDir /r "$SMPROGRAMS\GitLite"
 !macroend
 
+!macro NSIS_HOOK_PREINSTALL
+  !insertmacro GITTY_MIGRATE_LEGACY_DATA_DIR "$APPDATA\com.git-lite" "$APPDATA\com.gitty"
+  !insertmacro GITTY_MIGRATE_LEGACY_DATA_DIR "$LOCALAPPDATA\com.git-lite" "$LOCALAPPDATA\com.gitty"
+  !insertmacro GITTY_UNINSTALL_LEGACY_GITLITE HKCU
+  !insertmacro GITTY_UNINSTALL_LEGACY_GITLITE HKLM
+!macroend
+
+!macro NSIS_HOOK_POSTINSTALL
+  !insertmacro GITTY_CLEANUP_LEGACY_SHORTCUTS
+!macroend
+
 !macro NSIS_HOOK_POSTUNINSTALL
-  Delete "$DESKTOP\GitLite.lnk"
-  Delete "$SMPROGRAMS\GitLite.lnk"
-  RMDir /r "$SMPROGRAMS\GitLite"
+  !insertmacro GITTY_CLEANUP_LEGACY_SHORTCUTS
 !macroend
diff --git a/src-tauri/tauri.conf.json b/src-tauri/tauri.conf.json
index 0e4f340..d347ef6 100644
--- a/src-tauri/tauri.conf.json
+++ b/src-tauri/tauri.conf.json
@@ -2,7 +2,7 @@
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "Gitty",
   "version": "2026.7.16",
-  "identifier": "com.git-lite",
+  "identifier": "com.gitty",
   "build": {
     "beforeDevCommand": "npm run dev",
     "devUrl": "http://127.0.0.1:1420",