Just extract the copy again. Not sure if you need to run ./configure. Then do make uninstall.
What do you think is the problem?
What distro are you running?
I had a heck of time getting Mplayer-1.0.5 running for me myself. It wouldn't play some wmv videos and I new I had the codecs installed for them. This is what I did. This may be hard to follow. I only installed the necessary rpm's only since I installed rpm for kplayer. It requires mplayer rpm's. But I say you can do just only step 2.
Note: Better read the CVS section from mplayer Website since this post puts in smiley faces in the CVS commands.
I am running Fedora Core 2
Step1
* First install all RPM's Install rpm's so apps like kplayer know they are there.
mencoder-1.0pre5-2.i386.rpm
mplayer-1.0pre5-2.i386.rpm
mplayer-codecs-essential-20040704-1.i386.rpm
mplayer-codecs-linux-xanim-20040626-1.i386.rpm
mplayer-codecs-win32-20040704-1.i386.rpm
mplayer-codecs-win32-qt-extras-20040704-1.i386.rpm
mplayer-common-1.0pre5-2.i386.rpm
mplayer-font-cp1250-1.1-1.noarch.rpm
mplayer-font-iso1-1.1-1.noarch.rpm
mplayerplug-in-2.70-1.1.fc2.dag.i386.rpm
mplayer-skin-default-1.4-1.noarch.rpm
mplayer-skins_1.6-1.fr_noarch.rpm
mplayer-vidix-1.0pre5-2.i386.rpm
mplayer-vidix-ATI-Radeon-1.0pre5-2.i386.rpm
mplayer-gui-1.0pre5-2.i386.rpm
step 2
* Extract the files in all-20040916.tar.bz2 and copy to /usr/lib/win32
Once you the CVS files below, copy ffmpeg to the mplayer directory created from CVS.
run ./configure --enable-gui
run make
run make install
Ended up creating some fonts and skins folder. Just copied the Skins from rpm to home directory ~/.mplayer/Skins
type gmplayer -vo vx to start mplayer gui from a terminal.
CVS install of mplayer:
* Do this if I want a newer version thourgh CVS. Above is from CVS.
Downloading MPlayer CVS
You can also get MPlayer via anonymous CVS. Issue the following commands to get the latest sources:
cvs -d

server:anonymous@mplayerhq.hu:/cvsroot/mplayer login
cvs -z3 -d

server:anonymous@mplayerhq.hu:/cvsroot/mplayer co -P main
When asked for a password, just hit enter. A directory named main will be created. You can later update your sources by saying
cvs -z3 update -dPA
from within that directory.
FFmpeg libavcodec/libavformat
CVS MPlayer is not fully functional without a copy of the libavcodec codec library from FFmpeg. Get FFmpeg CVS via
cvs -d

server:anonymous@mplayerhq.hu:/cvsroot/ffmpeg login
cvs -z3 -d

server:anonymous@mplayerhq.hu:/cvsroot/ffmpeg co -P ffmpeg/libavcodec
When asked for a password, just hit enter. A directory named ffmpeg will be created. Copy the libavcodec subdirectory into the main directory just created from the MPlayer checkout.
In order to force automatic updates of libavcodec when you update MPlayer, add the following line to main/CVS/Entries:
D/libavcodec////
FFmpeg also contains libavformat, a library to decode container formats that can optionally be used to extend MPlayer's container format support. Get it from FFmpeg CVS by the same steps outlined above for libavcodec, just substitute libavcodec by libavformat everywhere.
To Compile Mplayer
MPlayer can be adapted to all kinds of needs and hardware environments. Copy libavcodec to root of mplayer before compiling to play wmv with no problems.
./configure
./configure --enable-gui if you want to use the GUI.
$ ./configure --with-codecsdir=/usr/local/lib/codecs --enable-gui$ make $ make install
If something does not work as expected, try
./configure --help to see the available options and select what you need.
make
make install
Brian1