> For the complete documentation index, see [llms.txt](https://docs.enercalc.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.enercalc.com/sel-faq/readme.md).

# Welcome

Where to find ENERCALC SEL's most popular FAQ topics covering installation, activation, updates, and licensing.

Thank you for using the ENERCALC® Knowledge Base and Frequently Asked Questions area.

This is a continually expanding collection of answers to common questions. To help you get started, here are our most popular topics:

<table data-view="cards"><thead><tr><th></th><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><h3><i class="fa-download" style="color:$primary;">:download:</i></h3></td><td><h4><strong>Installer / Updater</strong></h4></td><td>Download the single setup file to install or update to the latest build</td><td><a href="https://enercalc.link/install">https://enercalc.link/install</a></td></tr><tr><td><h3><i class="fa-book" style="color:$primary;">:book:</i></h3></td><td><h4><strong>Installation &#x26; Activation</strong></h4></td><td>Step-by-step guide to installing and activating the software</td><td><a href="https://docs.enercalc.com/sel-installation-activation">https://docs.enercalc.com/sel-installation-activation</a></td></tr><tr><td><h3><i class="fa-magnifying-glass" style="color:$primary;">:magnifying-glass:</i></h3></td><td><h4><strong>Checking for Updates</strong></h4></td><td>Use the web update system</td><td><a href="/sel-faq/setup-and-licensing/installation-activation-lice/web-update-system.md">Web Update System</a></td></tr><tr><td><h3><i class="fa-triangle-exclamation" style="color:$primary;">:triangle-exclamation:</i></h3></td><td><h4><strong>Internet Activation Trouble</strong></h4></td><td>Resolve internet activation issues</td><td><a href="/sel-faq/setup-and-licensing/installation-activation-lice/troubleshooting/difficulty-with-internet-activ.md">Difficulty with Internet Activation</a></td></tr><tr><td><h3><i class="fa-share-nodes" style="color:$primary;">:share-nodes:</i></h3></td><td><h4><strong>Share Flex Seats</strong></h4></td><td>Share license seats between computers</td><td><a href="/sel-faq/setup-and-licensing/installation-activation-lice/how-it-works/sharing-a-single-license-betwe.md">Share your seats between computers</a></td></tr><tr><td><h3><i class="fa-envelope" style="color:$primary;">:envelope:</i></h3></td><td><h4><strong>Resend My PCC</strong></h4></td><td>Get your Product Control Code emailed</td><td><a href="https://enercalc.com/request-pcc/">https://enercalc.com/request-pcc/</a></td></tr><tr><td><h3><i class="fa-windows" style="color:$primary;">:windows:</i></h3></td><td><h4><strong>Windows 11 &#x26; Requirements</strong></h4></td><td>Compatibility and system requirements</td><td><a href="https://enercalc.link/win11">https://enercalc.link/win11</a></td></tr><tr><td><h3><i class="fa-building-columns" style="color:$primary;">:building-columns:</i></h3></td><td><h4><strong>CBC 2022</strong></h4></td><td>California Building Code 2022 info</td><td><a href="https://enercalc.com/cbc2022/">https://enercalc.com/cbc2022/</a></td></tr><tr><td><h3><i class="fa-rotate" style="color:$primary;">:rotate:</i></h3></td><td><h4><strong>Renew My Subscription</strong></h4></td><td>Renew your ENERCALC subscription</td><td><a href="https://enercalc.chargebeeportal.com/">https://enercalc.chargebeeportal.com/</a></td></tr></tbody></table>


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