Last warning: TS2015 arives tomorrow, so make sure you back up your Railworks and/or any third-party content that you have accumulated. There were no issues reported with any VRC content after Monday’s update, but some folks did report missing routes RSC routes. If DTG can pooch their own content, then nothing is safe. Back it up!
At the very least, you need to make sure you have your VRC GP40 install files in a back-up location so you can re-install them if needed.