If "a picture is worth a thousand words", then a video is worth a million. You may find a playlist with detailed video tutorials here:

https://www.youtube.com/playlist?list=PLjrcnt9DtyaHsC5ATyH1zrJRhjYr8j7Oz

If you prefer to read instruction manuals, then here's a written summary of that playlist:

Bird Tools – Clash Preventor v5.0: Overview & User Guide Summary

Introduction:
Bird Tools - Clash Preventor is a powerful Revit add-in for real-time and manual clash detection. With version 5.0, it introduces major improvements such as background clash detection, link-to-link clash analysis, enhanced configuration, and improved Navisworks XML import. 

Part 1 - Free Trial Activation
The app is free to try, and the 30-Day Free Trial is activated on first download for new users. The installer requires no extra activation steps and can be silently deployed via tools like PDQ Deploy. Activation is on a named-user basis, so please ensure you're logged in with the same email used in Revit.

Part 2 – Configuring Clash Preventor
Configuration is done through the Bird Tools ribbon tab. Starting with v5.0, pushbuttons are more compact, and users can:
- Create, edit, and manage multiple configuration profiles
- Use link identifiers (e.g., Worksets or Type Parameters) to distinguish Revit links
- Select categories and parametric filters for both host and linked documents
- Save, load, or reset configuration files

New supported categories (in addition to Fabrication Parts): Structural Rebar, Areas, Rooms, MEP Spaces.

Global Settings Include:
- Toggle real-time detection
- Enable/disable notifications
- Include/exclude linked elements or point clouds
- Customize clash element visuals, zoom, 3D view, and section box behavior
- Adjust performance via multithreading, timeout, or detection accuracy (especially for fabrication parts and Structural Rebar)

Part 3 – Real-Time Clash Detection & Preview Interface
Once configured, elements are checked in real-time as they are created or modified. The new asynchronous real-time engine ensures no performance lag or UI freezing.

Clash Preview Interface Features:
- 2D/3D clash visualization
- Sorting, filtering, colorization
- Whitelisting clashes manually or by tolerance
- Live updates without reopening the interface
- Export to Excel
- Automatic section boxing and element selection

Clashes are recorded in a global report and updated dynamically, all of which are also accessible through the "Clash Browser" command.

Part 4 – Manual Clash Detection Modes
Clash Preventor supports three manual detection modes:
- Selection Mode – Checks user-selected elements (e.g., MEP systems)
- Active View Mode – Checks visible elements in the active view.
- Project Mode – Runs clash checks on the entire project.

All manual modes use the same clash preview interface and allow export, filtering, whitelisting, etc. Detected clashes, however, must be manually added to the report when using these modes.

Part 5 – Asynchronous Background Clash Detection
Manual modes now include background processing, letting users model uninterrupted during clash checks.
Features include:
- Queued runs
- Animated status bar button showing status and progress interface
- Option to view clashes as they’re detected (live updates)
- Progress indicator and abort functionality without losing already found clashes

Real-time clash detection also runs in the background by default and is queued with background manual checks when they are active.

Part 6 – Link-to-Link Clash Detection
New in v5.0, this mode allows users to:
- Detect clashes between linked models
- Use previously configured filters for each link
- Visualize clashes in the app's clash preview interface
- Can run in the background to avoid workflow interruption

It significantly reduces the need to use Navisworks® for this task.

Part 7 – Importing Autodesk® Navisworks® XML Reports

Clash Preventor supports importing Navisworks XML clash reports back into Revit.

Steps include:
- Exporting NWC with element ID conversion enabled
- Running clash checks in Navisworks
- Exporting clashes as XML (include all relevant parameters)
- Importing the XML in Revit using Clash Preventor

This enables browsing and solving Navisworks clashes easily and efficiently within Revit.

Part 8 – Subscribing to Clash Preventor

Subscription Options:
- Free trial (30 days)
- Single-seat: ideal for <15 users
- Multi-seat: packs of 20 seats with discounts up to 25%. Ideal for >15 users
- Unlimited domain license: allows all users under a corporate domain name and do not involve any user management (custom pricing)

For more features, tutorials, or support, please visit the Bird Tools website: www.birdtools-developers.com
or contact us at info@birdtools-developers.com