John, copying the unbinarized roads to the appropriate folders and also restoring the "source" folder from my 1.25 backup in P:\yourprojectname and then loading the old .tv4p solved a ton of problems for me. Just name to 1.26 source folder, source.old and then copy the backup over and test.

Thanks to the suggestion from GoodCluck on Discord, I restored my entire "Source" folder from a full P:\ drive backup I made right before the upgrade to 1.26 to
P:\yourprojectname and then re-opened the restored .tv4p file in Terrain builder. After opening the file, I had to show turn my sat map back on, but I loaded into Buldozer and everything seems to be back in its correct place. I renamed the old "source" file to "source.old" to preserve it. Please see the screenshot: