.mcdx file association lost when uninstall MP3.0 and still have MP 4.0

[jlee-10-11-12]

Hello,

I have installed both MathCAD Prime 3.0 and 4.0, today i uninstall MathCAD Prime 3.0, then .mcdx file association lost and can't recovery association.

Here is my effort:

1. open "Control Panel"->“file association configuration”, but there is no .mcdx file extension in the list, so fix failed.
2. use mouse right click button on the .mcdx file ,and select "open method" to choose "C:\Program Files\PTC\Mathcad Prime 4.0\MathcadPrime.exe", still no use. The .mcdx file icon is still white and double click .mcdx file can't open it with MathCAD Prime 4.0.

How to resolve this problem?

[LucMeekes]

Re-install Prime 4...?

Luc

[jlee-10-11-12 · Accepted solution]

I find another way to solve this problem.

1.copy this content to notepad and save as anyname.reg file.

2.double click and combine it to windows registry.

3.change the association of .mcdx.

4.choose MathCAD Prime 4.0

5.OK.

Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\.mcdx]
@="Mathcad"
"Content Type"="application/x-mathcad-mcd"

[VladimirN]

Don't forget to specify in which Windows OS you are doing all this.

[jlee-10-11-12]

yes, i do all this in Windows 10.