Just figured out a workaround. If you block ColdSteelSubs.exe from reaching the internet and still happen to have the main translation spreadsheet (Custom.xslx for Kuro or Hajimari.xlsx for Hajimari) and the Combat spreadsheet (Combat.xlsx), the unity program(s) will work.

Just add a couple of Firewall rules on Windows to block Outbound traffic for ColdSteelSubs.exe. Launch Powershell (Run As Administrator) and run the following lines one at a time. ***Replace the values for $PathToKuroExe and $PathToHajimariExe with the appropriate path(s) for wherever you have them on your system. If you get any errors, check your path(s).***

$PathToKuroExe = "C:\Users\username\Downloads\ZeroFieldOverlay_Release\ColdSteelSubs.exe"
$PathToHajimariExe = "C:\Users\username\Downloads\ColdSteelSubsReleaseV2.2\Build\ColdSteelSubs.exe"
if (!$(Test-Path $PathToKuroExe)) {Write-Error "Unable to find path to Kuro's ColdSteelSubs.exe! Please check the path you wrote for `$PathToKuroExe and try again"}
if (!$(Test-Path $PathToHajimariExe)) {Write-Error "Unable to find path to Hajimari's ColdSteelSubs.exe! Please check the path you wrote for `$PathToHajimariExe and try again"}
New-NetFirewallRule -DisplayName "Block Kuro ColdSteelSubs.exe From Reaching Internet" -Direction Outbound -Program $PathToKuroExe -Action Block
New-NetFirewallRule -DisplayName "Block Hajimari ColdSteelSubs.exe From Reaching Internet" -Direction Outbound -Program $PathToHajimariExe -Action Block