It's broken :(
Clicked URL: gogdownloader://mdk/win_installer
18:28:42 Started downloading info: mdk
18:28:42 Worker -1 Requesting
https://api.gog.com/en/downloader2/game/mdk/
18:28:43 Worker -1 Request
https://api.gog.com/en/downloader2/game/mdk/ successed?:True
18:28:43 MDK info fetched
18:28:43 ended downloading info
18:28:44 fetching download sizes and chunk info for MDK
18:28:44 Worker -1 Requesting
https://api.gog.com/en/downloader2/file/mdk/1_installer_0 18:28:45 Worker -1 Request
https://api.gog.com/en/downloader2/file/mdk/1_installer_0 successed?:True
18:28:46 Worker -1 Requesting
https://api.gog.com/en/downloader2/installer/mdk/1_installer_0/crc/
18:28:47 Worker -1 Request
https://api.gog.com/en/downloader2/installer/mdk/1_installer_0/crc/ successed?:True
UNHANDLED ERROR!
Message: The path is not of a legal form.
Stack trace: at System.IO.Path.NormalizePathFast(String path, Boolean fullCheck)
at System.IO.Path.NormalizePath(String path, Boolean fullCheck)
at System.IO.Path.GetPathRoot(String path)
at GOGCompanionApp.Worker.DownloadInfoSize(WorkerTaskDownloadInfoSize workerTask) in C:\gog dowloader - beta\GOG.com Companion\Worker.cs:line 1131
at GOGCompanionApp.Worker.Run() in C:\gog dowloader - beta\GOG.com Companion\Worker.cs:line 133
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.runTryCode(Object userData)
at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
Inner exception: