Won't upgrade from 4.01 to 4.2

[rpowers 5]

JD,I tried upgrading from 4.01 to 4.2 in prep for 4.3 for FSX.Get error message that FS is not installed.It is(C drive FS9).RC 4.01 is on my G drive.I ran makerunways.exe and copied the r4.csv file to data as instructed.I am getting the same error message about FS not installed.I am not using anything different then before.Thanks,Ron

[jd 57]

when do you get the error message? when you click rebuild scenery database?start rc, click debug, cause the error, and send me the .logjd

[rpowers 5]

I think I might have found the problem.I bet I am supposed to copy RCV4_3831 into main rc4 directory.I just tried running it thinking it would install itself.Am I right?Thanks,Ron