I am unable to successfully start p2a on my pc. I get an error box and it freezes at 20%. The gist of the message is that P2ABaseData.mfd failed. I changed the install location from C to D due to size limits. Any help will be appreciated. 

That message would indicate that you don’t have the database files installed correctly.  
If you installed the update, without the full installation, that would cause this.
If you installed the full version with Navigraph or NavDataPro data, then:
1.    Check that the database files are properly installed in the P2A Data folder.  There should be 2 database files: P2ABaseData.mdf and P2ADynamicData.mdf.
2.    If they are there, check if there are the corresponding log files: P2ABaseData_log.ldf and P2ADynamicData_log.ldf.  Delete these 2 log files and restart P2A to see if that fixes the issue.
3.    If they are not there, reinstall the full version of Pilot2ATC, paying close attention to the installation directory so that it is installed to the same directory as before rather than a sub-directory.
 

Dave

Thanks Dave, I found a reply that you gave to another user. All is well now so far.