Hi,
Not sure what the issue may be, I have checked the uploaded beta and I'm fairly sure the LitDev.xml has the modbus intellisense. The Extension Manager is SB-Prime should do all the unblocking automatically - sometime SB-Prime does need to be restarted to use the updated extension (if the previous version had been used in the current SB-Prime session).
If you are going the download route, you need to unblock zip, extract and copy LitDev.xml as well as LitDev.dll into the lib folder.
There is also an online version of the intellisense https://litdev.uk/LitDev_LDModbus.html
Not sure what the issue may be, I have checked the uploaded beta and I'm fairly sure the LitDev.xml has the modbus intellisense. The Extension Manager is SB-Prime should do all the unblocking automatically - sometime SB-Prime does need to be restarted to use the updated extension (if the previous version had been used in the current SB-Prime session).
If you are going the download route, you need to unblock zip, extract and copy LitDev.xml as well as LitDev.dll into the lib folder.
There is also an online version of the intellisense https://litdev.uk/LitDev_LDModbus.html