Pre-buy question about FSX folder to PMDG

Good evening to the PMDG team from Switzerland First of all, your products are day by day cheapper, due the currency lost of the US$ :-) In different posts you recommended do not install the FSX in the program-folder of the harddisk, instead directly on C:/FSX. Since FS9 with PMDGs 737, 747-400 and MD11 and FSX with the 747-400 and MD11 my FSX runs in the program folder without any problems. I don't think I can remove the FSX without a reinstall to the C./FSX? I don't want a reinstall of FSX with the SP1 and 2, PMDGs 747-400 and MD11. Why before never it was an issue and now it is? For me it is this important for a go or no go with NGX. Thank you very much for your answer on this matter. Have a nice evening and best regards Marcel