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Hi, I'm Mike G and I'll be assisting you. Are the switches new or old and failing to operate?
That switch isn't programmable. If they were working for 6 yrs and now have failed it is a replacement issue. Try disconnecting the yellow/red wire to separate the master and slave to determine which went bad.
When you disconnect the yellow/red wire it disconnects the slave device. If the master switch now works, replace the slave. If it doesn't replace the master.
The yellow/red wire is the interconnect between the two devices. You need to follow my instructions to get to a completion.
Your original statement was that you had two LBT30's. My instructions are based on that. Having worked for several years and not having any programing, I directed you in a way to determine which one failed. You now said that the failure was after 3 months. You are confusing the issue.
The way this is going makes me elect to opt out and let you work with another expert.