I recently bought the PMDG 737 800/900. I downloaded 2 liveries from the PMDG website, opened the PMDG livery manager, opened it in adminstrator, and then found out that I could not click on the 'Select Liveries to Install' button, it was clicking, but nothing was happening. Does anyone have a solution for this? Thankyou.

It should open a Windows Open File dialog box to point to the ptp files you downloaded.  I don't know what might cause this procedure to fail.... also, it should be showing the variants you have installed in FSX in the left side window of the livery manager. If these are missing, make sure the livery manager is pointing to your FSX directory.  If not, try running the Flight1 registry repair utility (run as admin).

 

Also, please note PMDG forum rules require a full name in your post. You can ask for support from PMDG directly by using their support portal at support.precisionmanuals.com  Hope this helps.