No, the version to use is still the old one. The reason for this I heard once is that on the Mendix side a lot of code needs to be changed and in the past they already did this once and then Tortoise changed again.
Regards,
Ronald
Here is a link to download TortoiseSVN v1.7.15 to save others time: https://sourceforge.net/projects/tortoisesvn/files/1.7.15/Application/