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CrashPlan Support

Uninstalling And Reinstalling The CrashPlan App

Applies to:
  • CrashPlan for Home
Need enterprise or small business documentation?
This article is intended for CrashPlan for Home users. For Code42 CrashPlan and CrashPlan PRO documentation, read this page on our enterprise support site.


If you are experiencing problems with the CrashPlan service, network communication, or have a corrupted cache file, uninstalling and reinstalling the CrashPlan app often helps to fix the issue.

Before you begin

  • Before performing an uninstall/reinstall, you should try clearing the cache first. Oftentimes, this fixes issues and is simpler and quicker to perform than uninstalling and reinstalling.
  • You must uninstall the CrashPlan app before reinstalling; make sure you have completed all the steps to uninstall CrashPlan before beginning to reinstall it.

Step 1: Uninstall

Standard uninstall

These steps describe how to perform a standard uninstall, which leaves a small amount of information on your computer so CrashPlan can remember your computer when you reinstall.

Operating System Standard Uninstall
  1. Open the Control Panel, and select Uninstall a Program.
  2. Select ({{cphome} and choose Uninstall.

You may be prompted that another user on the device is signed in. If another user is signed in, it may prevent the CrashPlan app from uninstalling completely. Code42 recommends coordinating with other users to ensure all users are signed out of the account before continuing.

Uninstall Fails
If the uninstallation fails, follow Microsoft's instructions to fix problems that block programs from being installed or removed.
Mac OS X
  1. Open the Finder.
  2. Press Command-Shift-G
    A dialog box appears: Go to the folder.
  3. Paste this text into the dialog box:
    • Installed for everyone: /Library/Application Support/CrashPlan/
    • Installed per user: ~/Library/Application Support/CrashPlan/
  4. Click Go.
  5. Double-click Uninstall.
  6. Follow the prompts to complete the uninstall process.
  1. Download the latest version of CrashPlan for Home.
  2. Uncompress the TGZ file to Downloads.
  3. Open Terminal and enter:
     cd ~/Downloads/crashplan-install
  4. Press Enter.
  5. Then enter:
    sudo ./ -i /usr/local/crashplan
  6. Press Enter.
  7. At the prompt, type YES to uninstall and press Enter.

Complete uninstall

Performing a complete uninstall removes the CrashPlan identity file, meaning there is no trace of the previous installation. After completing the standard uninstall, follow the additional steps below only if instructed to do so by a {{c42support}}.

Complete Uninstall Removes Inbound Backup Files
If you or a friend backs up to this computer, a complete uninstall permanently deletes all of the files backed up to this computer. Move the inbound backup archive to a new location if you plan to reinstall CrashPlan. The inbound backup folder's default location:

If installed for everyone (default):
  • Windows: C:\ProgramData\CrashPlan\backupArchives
  • OS X: /Library/Application Support/CrashPlan/backupArchives
  • Linux: /usr/local/var/crashplan/
If installed per user:
  • Windows: C:\Users\<username>\AppData\<Local or Roaming>\CrashPlan\backupArchives
  • OS X: ~/Library/Application Support/CrashPlan/backupArchives
Operating System Complete Uninstall
  1. Follow the Standard Uninstall process.
  2. Remove the following directory from your device:
    • If installed for everyone:
      • Windows Vista/2008/7/8/10/2012: C:\ProgramData\CrashPlan
      • Windows XP: C:\Documents and Settings\All Users\Application Data\CrashPlan
    • If installed per user: 
      • Windows Vista/2008/7/8/10/2012: C:\Users\<username>\AppData\<Local or Roaming\CrashPlan
        Depending on your network environment, user profiles can be either Local or Roaming.​
      • Windows XP: C:\Documents and Settings\<username>\Application Data\CrashPlan
Mac OS X
  1. Follow the Standard Uninstall process.
  2. Remove the following directory from your system:
    • Installed for everyone: /Library/Application Support/CrashPlan
    • Installed per user: ~/Library/Application Support/CrashPlan​
  1. Follow the Standard Uninstall process.
  2. Remove the following directory from your system: /var/lib/crashplan

Step 2: Install

  1. Download the latest version of CrashPlan for Home.
  2. Once the download completes, unzip the installer.
  3. Run the CrashPlan Installer:
    • Windows: Double-click the CrashPlan EXE file.
    • OS X: Double-click the CrashPlan DMG file, then double-click Install CrashPlan.
    • Linux: Run the shell script.
  4. Follow the prompts to complete the installation.
  5. Once the installation is complete, choose Existing Account on the sign in screen and enter your CrashPlan account information.

Additional installation information is available in the Installing CrashPlan article.

File Verification Scan
After you sign in, the CrashPlan app begins a file verification scan: CrashPlan inspects your file selection for any new, changed, or deleted files. Your backup continues from its previous state.

Adopting after reinstalling

In some cases, most often after performing a complete uninstall, you may need to perform the adoption process in order to reconnect your computer to your existing backup.