You can upgrade from any old version of product to the newer one (Single To Single Upgrade), or from single version to the Pack.

IBSurgeon Pack - 5-in-1. All recovery and optimization products in the single package for EUR 499!
IBSurgeon Pack is a complete set of tools to solve all problems with InterBase or Firebird databases: recover corrupted databases (IBFirstAID+FBFirstAID), extract data from corrupted backups of InterBase/Firebird databases (IBBackupSurgeon), undelete occasionally deleted records (IBUndelete) and perform analysis of InterBase/Firebird databases statistics and get recommendations for database regarding performance bottlenecks and index problems (IBAnalyst).
IBSurgeon Pack Personal is for 1 workpalce with restriction to repair only databases and backups which are directly owned by customer.
For technical support IBSurgeon Pack Tech Support should be used - it contains 4 workplace licenses and allows to recover clients' databases.

• InterBase and Firebird recovery guide
• Firebird and InterBase corruptions reasons
• FBDataGuard: Protecting your Firebird data
• Indices
• Common InterBase/Firebird errors caused by corruptions and their recovery chances
• Understanding Your Database with IBAnalyst
• What You Can See at Summary View in IBAnalyst
• How to get statistics from InterBase/Firebird database in right way
• IBAnalyst: More Tips and Tricks

• FBDataGuard 2.7: major update
• DBInfo: new free tool
• New product: IBSurgeon Log Viewer
• Firebird Conference 2011, Luxembourg, Nov 25-26
• IBSurgeon becomes Platinum Sponsor of Firebird Foundation