When you launch a portable version, it builds a virtualized environment (often called a sandbox directory). Any changes you make to custom workspaces, brush presets, or color palettes are saved entirely inside this folder rather than the host computer's system directories. Deleting this sandbox folder resets CorelDRAW entirely to its default state. The 64-Bit Advantage
When using the portable version of CorelDRAW 2020, keep in mind: Coreldraw 2020 Portable 64 Bit