This version only supports 32-bit VSTs. To use modern plugins, you would need a bit-bridge like jBridge, though this often causes crashes in such an old host.
The "Oxygen 32" update provided a way for owners of the software to run Logic without the physical dongle, effectively archiving the program for future use on legacy systems. It allowed the community to keep "abandonware" alive on vintage studio rigs. Running Logic 5.5.1 in the Modern Day emagic logic audio platinum 5 5 1oxygen 32 updated
Released in the early 2000s, Logic Audio Platinum 5.5.1 was the final stable version available for Windows users before Apple made the software a Mac exclusive. It represented a "Golden Era" of stability and feature density. Key Features of the Platinum Era: This version only supports 32-bit VSTs