TexAu DesktopHelp Center

Redeem your AppSumo purchase and get your license keys

Updated 18 October 2026 · 3 min read

After you buy TexAu Desktop on AppSumo, you redeem the purchase once. TexAu then gives you one license key for each machine in your tier.

Before you start#

  • You need your AppSumo account.
  • Choose the email for your TexAu license. You activate the app with this email.
  • A license key has the format XXXXX-XXXXX-XXXXX-XXXXX.

Redeem your purchase#

  1. Sign in to AppSumo.
  2. Open your TexAu Desktop purchase.
  3. Click the button to activate or redeem the deal.
  4. AppSumo opens the TexAu redeem page.
  5. Enter your email.
  6. Copy your license keys from the page and save them.

The redeem page shows your keys only once. TexAu also emails them to you. The email subject is "Your TexAu Desktop key" or "Your TexAu Desktop keys". The email also has the download links for the app.

You do not need to send an invoice or an order ID. AppSumo confirms the purchase to TexAu directly.

CAUTION: TexAu does not keep a copy of your keys. Keep the email in a safe place.

Activate the app#

  1. Download and install TexAu Desktop.
  2. Open TexAu.
  3. Enter the email that you used on the redeem page.
  4. Enter one license key.
  5. Click "Activate".

Use a different key on each computer. For the full steps, read Download, install, and activate TexAu Desktop.

Problems on the redeem page#

What happens Cause What to do
The page says the purchase is already activated. Each AppSumo purchase redeems once. Find your keys in the email from your first redeem.
The page says the purchase is deactivated. The purchase was refunded. A refunded purchase cannot be redeemed. Read Refunds and what happens to your license.

Problems when you activate#

Message What to do
"No license found for that email and key" Use the email from the redeem page. Copy the key again. Make sure that there are no extra spaces.
"This license is already active on another device." On the other computer, remove the device. If you no longer have that computer, contact support.
"This license has been permanently revoked and cannot be reused." The license was refunded or revoked.
"Unable to reach the license server." Make sure that the computer is online. Then click "Retry".

For every activation message, read the "Activation problems" table in Download, install, and activate TexAu Desktop.

If you lose your key#

  1. Search your inbox for "Your TexAu Desktop key".
  2. If you upgraded, also search for "Your TexAu Desktop plan was upgraded". That email has the keys added by the upgrade.
  3. If you cannot find the key, email support@texau.com from your license email.

TexAu cannot read your key. Support can send you a replacement key. Before we send it, AppSumo must confirm your license and the email on it to us. Your old key then stops working.

FAQs#

Can I use my old TexAu login or an AppSumo code in the app? No. The desktop app accepts only a TexAu Desktop license key in the format XXXXX-XXXXX-XXXXX-XXXXX.

Can I change the email on my license? Yes, while the AppSumo deal is running. Email support@texau.com with proof of your AppSumo purchase. After the deal ends, the email on a license cannot be changed.

How many keys do I get? One key for each machine in your tier: 1, 1, 3, 5 or 10. Read Your AppSumo plan.

Last verified: 2026-10-18