Bro You will have to learn reverse engineering
Open you exe in a disassembler such as IDA, find the part of code which ask for the password, find where is the "return" and make it always"return true" so any password that you enter will be valid.

Example [HOW TO]
CRACKING AN EXE FILE
This is a very simple tutorial which will let you a know a basic approach towards cracking a simple exe file…

SO LET US START!

1. Winrar is a simple application which asks us for the license key.

2. We need to install a disassembler software to crack this application.

3. You may use any disassembler you want..

4. Install it and launch the application….

5. Drag and drop your exe file into the panel…

6. Choose “load file as” MS-DOS Executable…click OK and Continue.

7. By default its IDA View-A…Please choose “HEXVIEW-A”

8. Scroll down to find the line saying ” ENTER YOUR LICENSE KEY” (different for different applications,in my case it is this).

9. Some where near that we found “GOOLGE” word next to the line saying “ENTER THE LICENSEKEY”..

10. THIS IS our LICENSE KEY!!!

11. Let us try “GOOGLE” as our key!

12. AND IT WORKED!!!!

Warning:
Reverse engineering any software without proper authorization and permissions is illegal. This tutorial is for education purposes only.

Offensive Hacking will not be responsible for any cyber crimes as it doesn’t encourage the same.


Notes: most of the games and softwares use Encryption techniques and obsfucation techniques to make it difficult for a hacker to reverse engineer the exe! We CAN definitely crack it no doubt but it require patience and depth of knowledge.

If you have no clue about programming you could try edit it using Hex Editor Workshop, it's a hex/binary editor, allowing you to modify exe files. Or you could try Notepad++