The "repack" typically refers to the update process where the v3.1 executable is applied to an existing installation.
EvoScan 3.1 Repack is a modified, community-optimized installation package of the popular evoscan 31 repack
Ultimately, the creator of EVOScan, Hamish, put thousands of hours into reverse-engineering ECUs. If you find the repack useful, consider buying a genuine license from the official EVOScan store to support future development of version 4.0 (which supports CAN bus and modern GDI engines). The "repack" typically refers to the update process
EvoScan is developed by a small independent developer. The software is niche and supports a relatively small community. the creator of EVOScan