Fix for texture paths with backslash at front

NifFile.cpp

@@ -537,6 +537,7 @@ void NifFile::TrimTexturePaths() {
 		for (int i = 0; i < 9; i++) {
 			if (GetTextureForShape(s, tFile, i) && !tFile.empty()) {
 				tFile = regex_replace(tFile, regex("/+|\\\\+"), "\\"); // Replace multiple slashes or forward slashes with one backslash
+				tFile = regex_replace(tFile, regex("^\\\\+", regex_constants::icase), ""); // Remove all backslashes from the front
 				tFile = regex_replace(tFile, regex(".*?Data\\\\", regex_constants::icase), ""); // Remove everything before and including the data path root
 				tFile = regex_replace(tFile, regex("^(?!^textures\\\\)", regex_constants::icase), "textures\\"); // Add textures root path if not existing
 				SetTextureForShape(s, tFile, i);