Error when editing Constructions database in WUFI 5.3

[Michael Hurd]

Recently upgraded to WUFI 5.3 and was creating some wall assemblies in the "constructions" database. went back to my user defined assemblies the next day to check my work and edit a few assemblies but when I'm done and click the "OK" button I get the following error message: Access violation at address 00476121 in module 'WUFI.exe'. Read of address 00002EC. I tried several things, changing the name of the assembly, etc and still get the same error.

See attached screen shot.

Any help would be appreciated!