If MicroStation® V8i is installed after installing AutoTURN, the toolbar will come up blank (i.e. no icons). This issue can be remedied by copying the AutoTURN.dll, which can be found in AutoTURN folder, to the C:\Program Files\Bentley\MicroStation\mdlapps\icons folder. This is assuming that your MicroStation® software is installed in the default location. If you have MicroStation® installed elsewhere, please adjust the above path accordingly (i.e. locate the mdlapps folder and if the folder named icons is not already in there, create a new icons folder and paste our dll within that icons folder.)
Please note that for MicroStation® V8i (Select Series 2), you should copy AutoTURN.dll file into: C:\Program Files\Bentley\MicroStation V8i (SELECTseries)\MicroStation\mdlapps\icons
If you have the 64-bit version of Windows®, please copy AutoTURN.dll to: C:\Program Files (x86)\Bentley\MicroStation V8i (SELECTseries)\MicroStation\mdlapps\icons
In AutoTURN 10.2 and later, the AutoTURN.dll can be found in C:\ProgramData\Transoft Solutions\AutoTURN 10\Transoft\Menus. To open ProgramData location, enter %ProgramData% in Windows Explorer, and browse to the aforementioned location.
In versions older than AutoTURN 10.2, AutoTURN.dll is by default located in C:\Users\Public\Transoft Solutions\AutoTURN 10