Any chance you can share the latest version? Here's the change log after the version you've shared:
ProductManager 5.0.0 • OpenCart 4.0.x
05/22/2023
- Initial release for OpenCart 4.0.0.0
ProductManager 4.1.7 • OpenCart 3.0.x
12/06/2023
- Improvement: OpenCart 3.0.3.9 Compatibility
- Bug fix: Add product URLs open in the new window
- Bug fix: Category bulk update issue when adding category already exist
ProductManager 4.1.6 • OpenCart 3.0.x
08/14/2020
- Improvement: OpenCart 3.0.3.6 Compatibility
- Bug fix: URL alias input not show up when keyword not available at db seo_url
ProductManager 4.1.5 • OpenCart 3.0.x
02/20/2020
- Bug fix: Fix expecting array on queryProductsList() empty data columns
- Bug fix: Fix the copy button deleting products in Internet Explorer and Edge.
- Bug fix: Fix an issue with the autocomplete
- Bug fix: Fix filter price and quantity dropdown options
- Bug fix: Filter and column visibility not restored after logout
- Bug fix: OpenCart product cache is now cleaned after a product update.
Thanks.