To access the full features of File Viewer Plus 4, you must either enter a unique activation key or use a linked Microsoft account, depending on where you acquired the software. This utility is paid software that requires a valid license for permanent "full" access, though a 14-day free trial is typically available. How to Obtain an Activation Key

Official activation keys are only provided upon purchasing a license from the File Viewer Plus website.

Email Delivery: After a successful purchase, the activation key is sent to the email address provided during checkout.

Pricing: One-time purchases are generally around $50.00, while annual subscriptions start at approximately $25.00. Activation Methods

The process for activating the full version varies based on your installation source: Website Download (FileViewerPlus.com):

Open the application and click Activate on the right side of the menu bar.

Copy the activation key from your purchase email and paste it into the activation window.

Click Activate (an active internet connection is required for this step). Microsoft Store Purchase:

No Key Required: Purchases made through the Microsoft Store do not use activation keys.

Automatic Recognition: Ensure you are logged into the same Microsoft account used for the purchase. The software should automatically recognize your license upon startup.

Troubleshooting: If you are prompted for a key after a Store purchase, you likely have the "web download" version installed by mistake. You must uninstall that version and reinstall it directly from the Microsoft Store. Key Policies & Retrieval

Version Specificity: Activation keys are often tied to specific major versions. For instance, a key for version 6 will not work for version 5.

Device Limit: A standard residential license allows for activation on up to two computers concurrently.

Lost Keys: If you lose your key, check your purchase confirmation email or contact File Viewer Plus Support with your purchase name and email to have it retrieved.

Important Security Note: Avoid "cracked" versions or keys from third-party sites, as these often contain malware and violate the End User License Agreement. License Activation - File Viewer Plus Support

To use the full version of File Viewer Plus 4, you must have a valid activation key issued upon purchase from the official developer, Sharpened Productions.  How to Get and Use Your Key 

Official Purchase: When you buy the software through the File Viewer Plus Store, an activation key is sent to you via email. Activation Process:

Open the application and click Activate on the right side of the menu bar.

Enter your key into the activation window (copy and paste is recommended to avoid typos). Click the Activate button while connected to the internet.

Version Compatibility: Activation keys are specific to the version they were purchased for. A key for File Viewer Plus 4 will only work for version 4, not newer versions like version 6.  Lost or Missing Keys 

Search Email: Look for your original purchase confirmation email.

Contact Support: If you cannot find your key, contact the developer through their Support Page with the name and email address used during purchase to have it retrieved.

Microsoft Store Version: If you purchased the app through the Microsoft Store, it typically does not require a manual key; instead, you must be signed into the correct Microsoft account to unlock the full features.  Free Full Access (Trial) 

You can test the full features of the latest version (currently version 6) by downloading a 14-day free trial from the Microsoft Store or the official website.  Download File Viewer Plus

3. Check for Employer or School Licenses

If you need File Viewer Plus for work or study, check with your IT department. Many organizations purchase volume licenses for software utilities, and you might be eligible for a free key through your institution.

1. Security Risks

Many websites offering "key generators" (keygens) or cracked versions of the software are breeding grounds for malware. Hackers often embed trojans, ransomware, and spyware into these executable files. When you run a keygen, you are potentially handing over your system’s security to cybercriminals.

How to Legally Obtain an Activation Key

If you find File Viewer Plus useful, supporting the developers ensures the software continues to improve. Here are the legitimate ways to get your key:

2. Look for Official Giveaways and Promotions

Software developers occasionally run promotions. It is worth subscribing to the File Viewer Plus newsletter or following their social media channels. They sometimes offer free licenses during special events or major version releases.

Troubleshooting Activation Issues

If you have a legitimate key but are running into trouble, here are a few common solutions:

• Check Your Internet Connection: The software needs to connect to the activation server to verify your key.
• Disable Antivirus Temporarily: Sometimes, over-protective antivirus software may block the connection during activation. (Remember to turn it back on immediately after!).
• Copy-Paste Carefully: Ensure there are no extra spaces at the beginning or end of the key when you paste it.
• Check for Caps Lock: Activation keys are usually case-sensitive.