As a service release, Ares 0.Cp1 does not add new features. Instead, it focuses on stability by fixing nine issues that could not wait for a next proper version. These are issues like a memory leak, using stale pointers, and some logic bugs. Seven of these could cause crashes, so it is recommended to update Ares.
Most notably, this fixes a crash on some machines when starting a single player mission that was due to some very hacky code, even by Ares's standards. Other fixes apply to Temporal weapons and Gunner logic, as well as Abductor weapons.
A not as important fix is for rectangular SW.Ranges which were one cell too wide in each dimension, thus affecting more cells than intended. Essentially, that's it for now.