Need help: opening a fits file in PI that is defaulting to PRISM

[umasscrew39]

I am capturing stacked frames in SharpCap which I can export in fits format to post-process in PI.  Unfortunately, the files are defaulting to open in PRISM as I had downloaded that program months ago but never used.  I have no idea how to stop them from opening in PRISM and open them in PI instead.  I am also not a Windows user (a Mac user mostly) so really lost as to how to fix this.  Any help would be appreciated.

Bruce

[dave_galera]

Hi Bruce,
Do a search in google, this is one URL I found:

https://www.thewindowsclub.com/change-file-associations-windows

[umasscrew39]

Thanks, Dave.  The problem I have is to leave them unassociated with any app- like it was before I downloaded PRISM.  I cannot figure out how to associate them with PI or even if that is possible.  It appears the FITS should be unassociated with any program and them pull them into PI.

[dave_galera]

Sorry I don't use windoze, I am on iMac, so I can't really help, although I would have thought you would associate and extension with a program, that is the only, as far as I am aware, way that windows knows what program to load to handle the file, and at the moment it sounds like it is set to PRISM and needs changeing to PI.

[umasscrew39]

Problem solved. 

Dave- appreciate you trying to help.

[dave_galera]

What was the problem and how did you solve it....

[umasscrew39]

For some reason, when I had uploaded PRISM, it replaced and unexplainably removed any other app options to open fits other than PRISM.  So, I downloaded FITS LIBERATOR and then it automatically replaced PRISM to open all .fits files.  I confirmed it by checking the associated file types, saw it replaced PRISM for my current fits files and then I was able to open it with no errors in PI.  Being primarily a Mac user this is all bizarre for me and reaffirms my believe in the Mac OSX and not Windows.  Unfortunately, most astro software is in Windows but I may switch to the SkyX and go Mac all the way. 

[dave_galera]

I am with you on Mac v Windoze, but INDIGO Sky might come to our rescue, and of course SkyX as you stated