I've never had cause to use a nightly build or a release candidate of TortoiseSVN before but when trying to create a patch, I got the following crash dump page: https://drdump.com/UploadedReport.aspx?ProblemID=175094&DumpID=8037510
I'd like to try out the fix that is mentioned but I really don't know what to do with the DLLs and ZIP files located at https://nightlybuilds.tortoisesvn.net/1.9.x/x64/full/
From the instruction in the web site
The 'Latest/' folder contains files which are built daily from the HEAD revision of TSVN trunk code, which is useful for testing the latest changes. These are not official released files, so any new features may not have been extensively tested.
You can take the files from the Latest build and replace the files in your local directory. Make sure to make a copy of the files you have locally in a separate directory so that you can fallback.
I believe the last build succeeded but upload of the Installer have failed. You might want to followup in their mailing list.
[exec] Uploading...
[exec] ERROR: SOAP 1.2 fault: SOAP-ENV:Sender[no subcode]
[exec] "HttpSendRequest failed"
[exec] Detail: The operation timed out