I've had the same issue. I downloaded the latest update and now it crashes on me when I try to open it. This is the crashlog:
08.10. 19:29:33.708 ***Logfile for C&C: Reloaded client***
08.10. 19:29:33.712 Client version: 2.11.0.0
08.10. 19:29:33.713 Loading settings.
08.10. 19:29:33.739 Loading generic translation file at C:\Users\17605\Downloads\CnCReloaded\Resources\Translations\en\Translation.ini
08.10. 19:29:33.755 Loaded translation: English
08.10. 19:29:33.773 Initializing updater.
08.10. 19:29:33.825 Updater: Initializing updater.
08.10. 19:29:33.830 Updater: Update mirror count: 1
08.10. 19:29:33.830 Updater: Running from: clientdx.exe
08.10. 19:29:33.834 OSDescription: Microsoft Windows 10.0.22631
08.10. 19:29:33.834 OSArchitecture: X64
08.10. 19:29:33.834 ProcessArchitecture: X64
08.10. 19:29:33.835 FrameworkDescription: .NET Framework 4.8.9261.0
08.10. 19:29:33.835 Selected OS profile: WIN810
08.10. 19:29:33.835 Current culture: en-US
08.10. 19:29:35.038 Hardware info: Intel® Core i7-8550U CPU @ 1.80GHz (4 cores) | Video controller: Intel® UHD Graphics 620 | Total physical memory: 8GB
08.10. 19:29:35.053 Removing partial custom component downloads.
08.10. 19:29:35.055 Checking for the existence of FinalSun.ini.
08.10. 19:29:35.055 FinalSun settings file exists.
08.10. 19:29:35.103 Writing installation path to the Windows registry.
08.10. 19:29:35.108 Starting background processing of INI files.
08.10. 19:29:35.108 /INI/Base does not exist, skipping background processing of INI files.
08.10. 19:29:35.295 KABOOOOOOM!!! Info:
08.10. 19:29:35.295 Type: System.NullReferenceException
08.10. 19:29:35.296 Message: Object reference not set to an instance of an object.
08.10. 19:29:35.336 Source: clientdx
08.10. 19:29:35.343 TargetSite.Name: Execute
08.10. 19:29:35.344 Stacktrace: at DTAClient.Startup.Execute() in C:\Proyectos\xna-cncnet-client\DXMainClient\Startup.cs:line 138
at DTAClient.PreStartup.Initialize(StartupParams parameters) in C:\Proyectos\xna-cncnet-client\DXMainClient\PreStartup.cs:line 202