Official OpenCart v.1.5.6.5_rc Changelog: New encryption.php File added, to make make it installable with PHP v.7.4.30 Versions:

https://www.opencart.com/index.php?route=marketplace/extension/info&extension_id=38012

History in Short, from a distant + neutral Swiss Point of View: Since it's Debut, Opencart v.1.5.6.5_rc was known, to be top-solid, top-secure, and fast, and not a single Topic yet exists on v.1.5.6.5 Problems, from someone using this Version, as I recall, during my ~Years of rather intense OC Forum Activity (~12'840+ Topic Replies). And for me, all this makes OC v.1.5.6.5_rc still the Number One Choice, if one not only looks for Version Numbers, but simply for a proven solid and also simple to handle final Onlineshop Version Class Release!

The Version OpenCart 1.5.6.5_rc was never given 'Final v.1.5.6.5' Status officially. In plain fear of Competition, I assume, because unfamous OC v.2.0 existed for some Months already, when 1.5.6.5_rc was made public by an Official on the OC Github Developer Site. But most everything on Add-On's for 1.5.6.x. Versions existed already. So, just re-announcing a new 'final' (older) Version would have harmed the new OC v.2 Market, since OC v.1.5.6.5 would have been favoured by parts of the OC Crowd for some time to come ... Merkent-Bootstrap-Theme-Extension for-Opencart-v.1.5.6.x

The famous Merkent Bootstrap Theme Extension for Opencart v.1.5.6.x Versions: https://github.com/IP-CAM/Merkent-Bootstrap-Theme-for-Opencart-v.1.5.6.x And here you find 36 different Bootstrap Themes for-Opencart-v.1.5.6.5 as well as a Theme-Switcher Extension: https://github.com/IP-CAM/36-Bootstrap-Themes-for-Opencart-v.1.5.6.5 Official OpenCart v.1.5.6.5_rc Changelog: https://github.com/opencart/opencart/blob/c2c8f9c4c8fce44bb81b394e235913306fb75707/changelog.md

Official OpenCart v.1.5.6.5_rc Download Site: The official v.1.5.6.5_rc Download Version, linked below, is not yet able, to handle PHP v.7.4.30: https://github.com/opencart/opencart/tree/c2c8f9c4c8fce44bb81b394e235913306fb75707

It would need this Encryption File, to work with PHP v.7.x: bnit.it mcrypt encryption replacement for Opencart v.1.5.6.4 v.1.5.6.5 for PHP7: https://www.opencart.com/index.php?route=marketplace/extension/info&extension_id=38012